100%
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数学真是一种挑战，一不小心就错了，but I like 挑战
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100% |
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沙发#
发布于：2015-06-20 16:14
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板凳#
发布于：2015-06-23 22:09
喜欢就好。多看看例题。试着做几道同类题，慢慢就好了
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地板#
发布于：2015-06-24 14:20
wangzijiao：喜欢就好。多看看例题。试着做几道同类题，慢慢就好了回到原帖  |
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