添加的部分：#9

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evolraelc wants to merge 13 commits intoDesignPatternCourseProjectTeam:masterfrom

evolraelc:master

Commits on Oct 28, 2019

添加的部分：
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Merge pull request #10 from evolraelc/master
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commit

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Commits on Oct 30, 2019

commit

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Merge branch 'develop' of https://github.com/DesignPatternCourseProjectTeam/DesignPatternProject.git into develop

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combined with upstream

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Merge pull request #18 from eatamath/develop
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revise 1

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Merge pull request #19 from eatamath/develop
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Commits on Nov 1, 2019

Merge pull request #3 from DesignPatternCourseProjectTeam/develop
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3.0
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3.0
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group commit

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