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
The old man is badly ill and he needs ___________ to hospital at once.
A.to be taken
B.to take
C.be taken
D.taken
206WP型、206KP型两种转向架固定轴距均为()。
A.1750mm
B.1850mm
C.2000mm
D.2400mm