Merge pull request #3 from BlackPearl2014/master

已经合并了提交，余杰
Update license-yujie.md

modify by amliang
Merge pull request #5 from amliang/master

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cource experience
Merge pull request #6 from xupeipei/master

cource experience  yujie
Merge pull request #2 from yujie13312963854/master

填写课程感受