题目：
小丽是一个女孩，她妈妈再生出一个男孩的可能性为[ ]
A．0
B．25%
C．50%
D．100%
答案：
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参考答案：E
小丽是一个女孩，她妈妈再生出一个男孩的可能性为[ ] A．0 B．25% C．5
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