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这个问题据说在facebook上已经分享 …
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请观察这些数字和字母： 20, GC 1 …
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如果至少有一部分A不是B，有的B是C，那 …
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- 2 answers
- 1 votes
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如果至少有一部分A不是B，有的A是C，那 …
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你有三个袋子，每个包里有两个球。袋子A包 …
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- 370 views
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- 477 views
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