一台线圈额定电压为220V的交流接触器，在交流220V和直流220V的电源上均可使用。（）

一台线圈额定电压为220V的交流接触器，在交流220V和直流220V的电源上均可使用。

线圈电压为220V的交流接触器，误接入220V直流电源上；或线圈电压为220V直流接触器，误接入220V交流电源上，会产生什么后果？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.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

通常所说多少伏的晶闸管，是指它的（）是多少伏。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。