投入油系统油泵后,应启动主油箱(),调整风机人口门,使油箱负压保持在()kPa。
参考答案:排烟风机;0.2~0.25
_____ Jack ____ Mike can go to the meeting because one of them must stay in the classroom.
A.Not only but also
B.Neither nor
C.Both and
D.Either or
《水浒传》中在快活林里,醉打蒋门神的好汉是()
A.李逵
B.武松
C.鲁智深
D.林冲