问题描述：
A woman has 2 sons.If you were her doctor,what would you advise her of her chances of a daughter...
A woman has 2 sons.If you were her doctor,what would you advise her of her chances of a daughter born in the next pregnancy?
A woman has 2 sons.If you were her doctor,what would you advise her of her chances of a daughter born in the next pregnancy?
问题解答：
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