口服用于肠道感染或肠道手术前准备的是( )
A．羧苄西林B．阿米卡星C．庆大霉素D．多黏菌素E．红霉素
参考答案：C
It is none of my business. It's up to you to decide he bought yesterday is used for.
A．what what
B．what that
C．that what
D．that which
简述防抱死制动控制系统的组成及各部件作用。
