题目内容
早产儿的定义为
2021-11-15
A.胎龄小于37周，体重小于3000g
B.胎龄小于37周，体重小于2500g
C.胎龄小于37周
D.体重小于2500g
E.体重低于同胎龄儿平均体重2个标准差
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