In good weather,you should deploy the sea anchor from the liferaft to().
A. keep the liferaft from capsizing
B. navigate against the current
C. keep personnel from getting seasick
D. stay in the general locatio
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电子恒功励磁控制系统,通常以调节发电机电压恒定为目标。
A. 正确
B. 错误
() is a machine by which electrical energy is transformed into mechanical energy.
An alternator
B. An electric motor
C. A diesel engine
D. A main switchboard
公差等级的高低是加工难易、成本高低、使用性能优劣的标志。
A. 正确
B. 错误