[{"itemType":"chapter","number":"1","published_number":0,"title":"A\/B testing","result":"","resultStatus":"","lock":"","status":"published","taskId":"7567","isOptional":"0","type":"chapter","isTaskFree":"","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"","activityEndTime":"","fileStorage":"","isTaskTryLookable":"","isSingleTaskLesson":false},{"itemType":"task","number":"1","published_number":"1","title":"A\/B Test \u7684\u76ee\u7684\u548c\u6307\u6807","result":"","resultStatus":"","lock":false,"status":"published","taskId":"7688","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"02:08:41","activityEndTime":"","fileStorage":"cloud","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"2","published_number":"2","title":"A\/B Test \u7edf\u8ba1\u5b66\u5e94\u7528","result":"","resultStatus":"","lock":false,"status":"published","taskId":"7689","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"02:08:09","activityEndTime":"","fileStorage":"cloud","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"3","published_number":"3","title":"A\/B Test \u4e0d\u540c\u76ee\u7684\u6307\u6807\u9009\u62e9","result":"","resultStatus":"","lock":false,"status":"published","taskId":"7690","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"02:07:12","activityEndTime":"","fileStorage":"cloud","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"4","published_number":"4","title":"A\/B Test \u6307\u6807\u8be6\u89e3\uff1a\u8fd0\u7528\u5b9e\u9645\u9762\u8bd5\u95ee\u9898\u8fdb\u884c\u8bb2\u89e3","result":"","resultStatus":"","lock":false,"status":"published","taskId":"7691","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"01:59:26","activityEndTime":"","fileStorage":"cloud","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"5","published_number":"5","title":"A\/B Test \u603b\u7ed3","result":"","resultStatus":"","lock":false,"status":"published","taskId":"7692","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"01:53:43","activityEndTime":"","fileStorage":"cloud","isTaskTryLookable":0,"isSingleTaskLesson":true},{"itemType":"task","number":"6","published_number":"6","title":"A\/B Test \u5de5\u4e1a\u7ea7\u6848\u4f8b\u5b9e\u64cd","result":"","resultStatus":"","lock":false,"status":"published","taskId":"7693","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"01:59:07","activityEndTime":"","fileStorage":"cloud","isTaskTryLookable":0,"isSingleTaskLesson":true}]