卵巢的功能有（）
A.产生性激素
B.产生促性腺激素
C.产生多肽激素
D.产生卵子
E.产生反馈调节的因子
参考答案：A, C, D
________ a difficult situation, so you should send a message to him and give some advice to him .
A．As he is in
B．He is in
C．Being in
D．He being in
如何看待克隆动物的伦理问题？
