在对风档刮水器(雨刷)进行试验时应当:()
A、先给风档玻璃上喷上排雨液。
B、边撒干净的水边试验。
C、先给风档玻璃上涂一层润滑油。
D、保持玻璃干燥和清洁。
参考答案:B
He the job well, but he so careless.
A.had done; had been
B.could do; was
C.could have done; was
D.hadn’t done; had been
起重用的钢丝绳,磨损部分超过40%,即要报废,磨损部分在40%以下,还可以降低使用。()