空气的消毒宜采用（）
A.高压蒸汽灭菌
B.干热灭菌
C.滤过除菌
D.紫外线
E.煮沸消毒
参考答案：D
----Bob, I know you want to be an actor. ____________?
----I’m going to take acting lessons.
A．How is it going
B．What are you going to be
C．How are you going to do that
D．Where are you going to work
如何减少水泵汽蚀的发生？
