第六讲随堂测讲解视频测试一：https://mv.xesimg.com/home/2019/02/12/1549961755833136349931.mp4测试二：https://mv.xesimg.com/home/2019/02/12/1549961997376286493280.mp4测试三：https://mv.xesimg.com/home/2019/02/12/1549962425413544595196.mp4测试四：https://mv.xesimg.com/home/2019/02/12/1549962616584837137813.mp4测试五：https://mv.xesimg.com/home/2019/02/12/1549962923197098044478.mp4测试六：https://mv.xesimg.com/home/2019/02/12/1549963213211884841986.mp4测试七：（1）https://mv.xesimg.com/home/2019/02/12/1549963532960216124424.mp4（2）https://mv.xesimg.com/home/2019/02/12/1549963756590419317526.mp4（3）https://mv.xesimg.com/home/2019/02/12/1549964116747485687187.mp4测试八：https://mv.xesimg.com/home/2019/02/12/1549964235130061551523.mp4
