支原体、衣原体引起的肺炎宜选用（）
A．氟康唑
B．万古霉素
C．克林霉素
D．阿奇霉素
E．头孢哌酮
参考答案：D
.______himself to children’s charity work, the famous actor missed _________from a terminal disease.
A．Devoted ; being saved
B．Devoting; being saved
C．Devoted; to be saved
D．Devoting; to be saved
模拟系统中，频道间隔是（）
A、25kHz
B、200kHz
C、1.25MHz
D、45MHz
