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【单选题】
下列命题正确的有（  ） （1）很小的实数可以构成集合； （2）集合 与集合 是同一个集合； （3） 这些数组成的集合有 个元素； （4）集合 是指第二和第四象限内的点集。
A.
个
B.
个
C.
个
D.
个
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B.
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