单项选择题
During the watch keeping at sea, at appropriate intervals inspection should be made of （）, auxiliary machinery and steering gear spaces by the duty engineer.
A.the main propulsion plant B.lifesaving jackets C.lifeboat engine D.state of emergency generator
单项选择题 The ground terminal of a starter should be connected to （）
单项选择题 Wires should have each feature of the following except （）
单项选择题 （）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
