胚胎在母体内的发育过程分为胚期和胎期两个时期,以下哪个过程不在胚胎期完成
A.受精
B.卵裂
C.胚层形成
D.器官原基的建立
E.各器官的结构和功能逐渐完善
参考答案:E
---I want to apologize for us all.
---_______ .
A.Don’t think more about it
B.It’s very kind of you to say that
C.Thank you very much
D.It doesn’t matter