1人加入学习
(0人评价)
该课程属于 1170-王同学-大数据就业-就业为主 请加入后再学习
{
"id": "11521",
"isDefault": "1",
"learnMode": "freeMode",
"isMember": "",
"status": "published",
"currentTaskId": "",
"isHideUnpublish": "0"
}
{
"i18nChapterName": " ",
"i18nUnitName": " ",
"i18nLessonName": "课时",
"i18nTaskName":"任务"
}
[{"itemType":"unit","number":"1","published_number":0,"title":"\u7b2c\u4e00\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776598","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"1","published_number":"1","title":"\u4e0a\u9636\u6bb5\u8003\u6838\u901a\u8fc7\u5361\u70b9","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678982","isOptional":"0","type":"testpaper","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"2","published_number":"2","title":"\u8bfe\u4ef6\u4e0b\u8f7d","result":"","resultStatus":"","lock":false,"status":"published","taskId":"1041977","isOptional":"0","type":"text","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"3","published_number":"3","title":"1.1.1 The Learning Problem - Course Intr.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678984","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"09:49","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"4","published_number":"4","title":"2.1.2 The Learning Problem - What Is Mac.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678985","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"18:28","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"5","published_number":"5","title":"3.1.3 The Learning Problem - Application.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678986","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"18:56","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"6","published_number":"6","title":"4.1.4 The Learning Problem - Components .mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678987","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"11:45","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"2","published_number":0,"title":"\u7b2c\u4e8c\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776517","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"7","published_number":"7","title":"5.1.5 The Learning Problem - Machine Lea.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678988","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"10:21","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"8","published_number":"8","title":"6.2.1 Learning to Answer Yes_No - Percep.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678989","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"15:11","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"9","published_number":"9","title":"7.2.2 Learning to Answer Yes_No - Percep.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678990","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"19:46","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"10","published_number":"10","title":"8.2.3 Learning to Answer Yes_No - Guaran.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678991","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"12:37","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"11","published_number":"11","title":"9.2.4 Learning to Answer Yes_No - Non-Se.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678992","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"12:55","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"12","published_number":"12","title":"\u6bcf\u65e5\u4f5c\u4e1a","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678993","isOptional":"0","type":"testpaper","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"3","published_number":0,"title":"\u7b2c\u4e09\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776518","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"13","published_number":"13","title":"10.3.1 Types of Learning - Learning with.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678994","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"16:56","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"14","published_number":"14","title":"11.3.2 Types of Learning - Learning with.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678995","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"18:12","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"15","published_number":"15","title":"12.3.3 Types of Learning - Learning with.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678996","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"11:09","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"16","published_number":"16","title":"13.3.4 Types of Learning - Learning with.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678997","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"14:13","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"4","published_number":0,"title":"\u7b2c\u56db\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776523","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"17","published_number":"17","title":"14.4.1 Feasibility of Learning - Learnin.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678998","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"13:02","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"18","published_number":"18","title":"15.4.2 Feasibility of Learning - Probabi.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"678999","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"11:32","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"19","published_number":"19","title":"16.4.3 Feasibility of Learning - Connect.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679000","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"16:46","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"20","published_number":"20","title":"17.4.4 Feasibility of Learning - Connect.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679001","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"18:05","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"21","published_number":"21","title":"\u6bcf\u65e5\u4f5c\u4e1a","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679002","isOptional":"0","type":"testpaper","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"5","published_number":0,"title":"\u7b2c\u4e94\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776528","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"22","published_number":"22","title":"18.5.1 Training versus Testing - Recap a.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679003","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"13:18","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"23","published_number":"23","title":"19.5.2 Training versus Testing - Effecti.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679004","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"15:25","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"24","published_number":"24","title":"20.5.3 Training versus Testing - Effecti.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679005","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"16:17","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"25","published_number":"25","title":"21.5.4 Training versus Testing - Break P.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679006","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"07:44","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"6","published_number":0,"title":"\u7b2c\u516d\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776533","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"26","published_number":"26","title":"22.6.1 Theory of Generalization - Restri.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679007","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"13:46","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"27","published_number":"27","title":"23.6.2 Theory of Generalization - Boundi.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679008","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"06:56","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"28","published_number":"28","title":"24.6.3 Theory of Generalization - Boundi.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679009","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"14:46","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"29","published_number":"29","title":"25.6.4 Theory of Generalization - A Pict.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679010","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"16:01","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"30","published_number":"30","title":"\u6bcf\u65e5\u4f5c\u4e1a","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679011","isOptional":"0","type":"testpaper","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"7","published_number":0,"title":"\u7b2c\u4e03\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776538","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"31","published_number":"31","title":"26.7.1 The VC Dimension - Definition of.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679012","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"12:33","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"32","published_number":"32","title":"27.7.2 The VC Dimension - VC Dimension o.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679013","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"13:27","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"33","published_number":"33","title":"28.7.3 The VC Dimension - Physical Intui.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679014","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"06:10","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"34","published_number":"34","title":"29.7.4 The VC Dimension - Interpreting V.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679015","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"17:13","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"8","published_number":0,"title":"\u7b2c\u516b\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776543","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"35","published_number":"35","title":"30.8.1 Noise and Error - Noise and Proba.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679016","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"16:29","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"36","published_number":"36","title":"31.8.2 Noise and Error - Error Measure.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679017","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"15:10","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"37","published_number":"37","title":"32.8.3 Noise and Error - Algorithmic Err.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679018","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"13:46","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"38","published_number":"38","title":"33.8.4 Noise and Error - Weighted Classi.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679019","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"16:54","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"39","published_number":"39","title":"\u6bcf\u65e5\u4f5c\u4e1a","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679020","isOptional":"0","type":"testpaper","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"9","published_number":0,"title":"\u7b2c\u4e5d\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776548","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"40","published_number":"40","title":"34.9.1 Linear Regression - Linear Regres.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679021","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"09:36","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"41","published_number":"41","title":"35.9.2 Linear Regression - Linear Regres.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679022","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"20:02","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"42","published_number":"42","title":"36.9.3 Linear Regression - Generalizatio.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679023","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"20:34","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"43","published_number":"43","title":"37.9.4 Linear Regression - for Binary Cl.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679024","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"11:23","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"10","published_number":0,"title":"\u7b2c\u5341\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776553","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"44","published_number":"44","title":"38.10.1 Logistic Regression - Logistic R.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679025","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"14:01","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"45","published_number":"45","title":"39.10.2 Logistic Regression - Logistic R.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679026","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"15:58","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"46","published_number":"46","title":"40.10.3 Logistic Regression - Gradient o.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679027","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"15:37","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"47","published_number":"47","title":"41.10.4 Logistic Regression - Gradient D.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679028","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"19:18","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"48","published_number":"48","title":"\u6bcf\u65e5\u4f5c\u4e1a","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679029","isOptional":"0","type":"testpaper","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"11","published_number":0,"title":"\u7b2c\u5341\u4e00\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776558","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"49","published_number":"49","title":"42.11.1 Linear Models for Classification.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679030","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"20:58","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"50","published_number":"50","title":"43.11.2 Linear Models for Classification.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679031","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"11:39","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"51","published_number":"51","title":"44.11.3 Linear Models for Classification.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679032","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"14:18","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"52","published_number":"52","title":"45.11.4 Linear Models for Classification.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679033","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"11:35","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"12","published_number":0,"title":"\u7b2c\u5341\u4e8c\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776563","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"53","published_number":"53","title":"46.12.1 Nonlinear Transformation - Quadr.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679034","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"23:20","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"54","published_number":"54","title":"47.12.2 Nonlinear Transformation - Nonli.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679035","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"09:52","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"55","published_number":"55","title":"48.12.3 Nonlinear Transformation - Price.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679036","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"15:37","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"56","published_number":"56","title":"49.12.4 Nonlinear Transformation - Struc.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679037","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"09:36","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"57","published_number":"57","title":"\u6bcf\u65e5\u4f5c\u4e1a","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679038","isOptional":"0","type":"testpaper","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"13","published_number":0,"title":"\u7b2c\u5341\u4e09\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776568","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"58","published_number":"58","title":"50.13.1 Hazard of Overfitting - What is.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679039","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"10:18","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"59","published_number":"59","title":"51.13.2 Hazard of Overfitting - The Role.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679040","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"13:35","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"60","published_number":"60","title":"52.13.3 Hazard of Overfitting - Determin.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679041","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"14:07","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"61","published_number":"61","title":"53.13.4 Hazard of Overfitting - Dealing.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679042","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"10:49","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"14","published_number":0,"title":"\u7b2c\u5341\u56db\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776573","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"62","published_number":"62","title":"54.14.1 Regularization - Regularized Hyp.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679043","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"18:44","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"63","published_number":"63","title":"55.14.2 Regularization - Weight Decay Re.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679044","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"24:07","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"64","published_number":"64","title":"56.14.3 Regularization - Regularization.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679045","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"08:15","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"65","published_number":"65","title":"57.14.4 Regularization - General Regular.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679046","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"13:28","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"66","published_number":"66","title":"\u6bcf\u65e5\u4f5c\u4e1a","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679047","isOptional":"0","type":"testpaper","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"15","published_number":0,"title":"\u7b2c\u5341\u4e94\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776578","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"67","published_number":"67","title":"58.15.1 Validation - Model Selection Pro.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679048","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"15:33","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"68","published_number":"68","title":"59.15.2 Validation - Validation.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679049","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"13:24","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"69","published_number":"69","title":"60.15.3 Validation - Leave-One-Out Cross.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679050","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"16:06","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"70","published_number":"70","title":"61.15.4 Validation - V-Fold Cross Valida.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679051","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"10:41","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"unit","number":"16","published_number":0,"title":"\u7b2c\u5341\u516d\u5929\u7684\u5b66\u4e60\u5185\u5bb9\u300c\u5efa\u8bae\u6309\u8ba1\u5212\u5b8c\u6210\u6bcf\u5929\u4efb\u52a1\u300d\u4ee5\u4fdd\u8bc1\u6700\u7ec8\u76ee\u6807\u6309\u8ba1\u5212\u8fbe\u6210\uff01\uff01\uff01","result":"","resultStatus":"","lock":"","status":"published","taskId":"776583","isOptional":"0","type":"unit","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"71","published_number":"71","title":"62.16.1 Three Learning Principles - Occa.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679052","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"09:36","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"72","published_number":"72","title":"63.16.2 Three Learning Principles - Samp.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679053","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"11:50","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"73","published_number":"73","title":"64.16.3 Three Learning Principles - Data.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679054","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"12:28","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"74","published_number":"74","title":"65.16.4 Three Learning Principles - Powe.mp4","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679055","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"08:49","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"75","published_number":"75","title":"\u6bcf\u65e5\u4f5c\u4e1a","result":"","resultStatus":"","lock":false,"status":"published","taskId":"679056","isOptional":"0","type":"testpaper","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":0,"isSingleTaskLesson":true}]
课程特色
考试(9)
图文(1)
视频(65)