单项选择题
The running wheel runs along the （）(导轨)on the hatch coaming top.
A. guide rope B. guide rail C. side coaming D. side roller
单项选择题 After operation, drop the control levers into stowing hole, and （）(停止)the electric motor.
单项选择题 （）(高速)operation and rough handling of covers are dangerous.
单项选择题 In order to avoid shock, reduce the speed by （）(低速控制器)when the cover comes near the stoppers.
