单项选择题
A. control lever B. control panel C. control loop D. inching control
When the weather becomes bad, the hatch covers will be ...
单项选择题When the weather becomes bad, the hatch covers will be （）(关闭).
A. closed B. opened C. handled D. opened and closed
Don’t operate two or more （）(舱盖)at the same time.A.caps...
单项选择题Don’t operate two or more （）(舱盖)at the same time.
A.caps B.levers C.hatch covers D.hatches
lead block（）A.滑车B.导向滑车C.千斤索D.底脚滑车
单项选择题lead block（）
A.滑车 B.导向滑车 C.千斤索 D.底脚滑车
