单项选择题
A. damaged derrick B. damaging derrick C. derrick to be damaged D. derrick
Push the “Oil Jack” position （）until the cover comes to...
单项选择题Push the “Oil Jack” position （）until the cover comes to its final closed position.
A.lifted B.lowered C.opened D.closed
The unlashing work must be finished before （）.A.dischar...
单项选择题The unlashing work must be finished before （）.
A.discharged B.being discharged C.discharging D.discharges
We haven’t got enough （）to do the work.A.headsB.handsC....
单项选择题We haven’t got enough （）to do the work.
A.heads B.hands C.fingers D.eyes
