胚泡的组成（）.
A.滋养层、内细胞群、胚外体腔
B.滋养层、胚泡腔、内细胞群
C.胚盘、胚泡腔、内细胞群
D.绒毛膜、胚外体腔、胚盘
参考答案：B
—I’m sorry. That wasn’t of much help.
—Oh, ______. As a matter of fact, it was most helpful.
A．sure it was
B．it doesn’t matter
C．of course not
D．thanks anyway
什么可以影响转氨酶的升高？
