直流串励式电动机空载时，输出功率为零。

串励直流电动机空载转速（），（）空载或轻载运行。

串励直流电动机可以空载运行。

串励电动机空载下运转，转速将（）。

直流串励电动机能否空载运行？为什么？

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

在相同的启动电流下，串励电动机的启动转矩比并励电机（）。

在相同的起动电流下，串励电动机的起动转矩比并励电机（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。