三个月的胎儿肾脏开始行使排泄功能,将尿液排入()。
A.胚内体腔
B.卵黄囊
C.羊膜腔
D.泄殖腔
参考答案:C
The teacher demands that she her test papers within ten minutes.
A.turn in B hands in C.have turned in D has handed in
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