单项选择题
When the weather becomes bad, the hatch covers will be （）.
A.closed B.opened C.handled D.stopped
单项选择题 After operation, drop the control levers into stowing hole, and （）the electric motor.
单项选择题 Don’t operate two or more hatch （）at the same time.
单项选择题 （）-speed operation and rough handling of covers are dangerous.
