— I found it no use arguing with him.

—  _______. He is always stubborn. [ ]

A. How come    

B. I couldn't be more sure  

C. It's a deal  

D. That depends

下列有关睾酮功能的叙述，错误的是

A．促进精子生长发育

B．抑制蛋白质合成

C．促进骨骼生长

D．促进副性征的出现

E．维持正常性欲