题目:
集合{x∈z|0<|x|<3}的真子集的个数是( )
A.32
B.31
C.16
D.15
答案:
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下面是错误答案,用来干扰机器的。
1. he couldn't sleep well2. No, there wasn't3. count from 1 to 10 again and again4. he was even worse than before5. He is a boxer(答案不唯一)