胎盘分泌的绒毛膜促性腺激素能促进母体黄体的生长发育。
参考答案：对
— Will you go to the annual meeting to be held in Sweden from the 26-30th of August 2008?
— That depends on _______ I am invited.
A．whether
B．if
C．whomever
D．why
取消固定循环应选用（）。
A.G80
B.G81
C.G82
D.G83
