修正了几个问题#11

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notxx wants to merge 8 commits intoNevolution:masterfrom

Commits on May 30, 2019

开始修改
 notxx
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Commits on May 31, 2019

修正：
notxx
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修正：
notxx
committed

Commits on Jun 2, 2019

更改：
notxx
committed

Commits on Jun 3, 2019

修正
 notxx
committed

Commits on Jul 31, 2019

pull request
notxx
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Commits on Aug 3, 2019