If it doesn't rain tomorrow, I _____ fishing. [ ]
A. go
B. went
C. going
D. will go
答案:D
故障停机保养是设备出现()时所做的保养
A.故障停机
B.异响
C.次品
D.异味
液压传动中,力的静压传递不变原理是什么?