趣味数理一百题(1)正常分娩
Natural Childbirth
Two siblings are born naturally on the same date, in the same year, to the same mother and the same father. However, they are not twins-neither fraternal nor identical. Is this possible or impossible?
HINT:
Pay careful attention to what is stated and what is not stated.
本期题目:
请用英语作答
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