走线架的上沿高度应包含布缆高度().
A.250mm
B.200mm
C.150mm
D.100mm
参考答案:C
The computer on the desk is ______. [ ]
A. twins
B. the twin's
C. the twins
D. the twins'
下列头孢菌素类药物中,属于第3代头孢菌素的是()
A.头孢噻盼
B.头孢哌酮
C.头孢克洛
D.头孢拉定
E.头孢唑林