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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】About Gender: Differences It is said that the first thing we ask about a newborn baby is "Is it a boy or a girl" But it might be considered that this is the first thing we ask ourselves whenever we me...
A.
biological reasons
B.
social reasons
C.
economic reasons
D.
reasons not mentioned in the passage