A．无菌
B．灭菌
C．消毒
D．防腐
E．除菌
蜡丸的制备工艺为（）
A.A
B.B
C.C
D.D
E.E
参考答案：E
The open-air celebration has been put off __________ the bad weather.
A．in case of
B．in spite of
C．instead of
D．because of
串级控制系统主要用于解决什么问题？
