问题 选择题
下面说法错误的是(  )
A.0.5是分数
B.0既不是负数,也不是正数
C.-2.74是负分数
D.非负数是正数
答案

答案:D

写作题

Writing.

根据题意,完成下面一则通知。

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                                                                                                        June 22

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