脸书上的全国读书周（National Book Week）活动

喜欢就捧捧场 · 发表于 2016-12-7 03:59:21

She was a widow, a chameleon lady who worked in her flower beds in an old straw hat and men's overalls, but after her five o'clock bath she would appear on the porch and reign over the street with magisterial beauty.

橘子和枪 · 发表于 2016-12-7 08:05:57

必须进行系统的、基于功能的设计和分析，使得可在早期阶段.......
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句号在哪儿？

海点 · 发表于 2016-12-7 19:26:40

A random variable is a variable that can take on different values random.

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