精囊液占精浆的（）。
A.5%～10%
B.15%～30%
C.40%～50%
D.50%～80%
E.70%～90%
参考答案：D
Daniel is helpful, and he always_______. [ ]
A. thinks of himself first
B. thinks of others first
C. thinks himself first
D. thinks others first
羽绒服装
