输出继电器（OR）通过一对（）触点将PLC的控制信号传递给负载。

“董永的传说”中的董永，其人物原型生活在东汉时期山东的（）。

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.

东汉时期（）投笔从戎，出使西域，加强了东汉王朝与西域各国的友好关系。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

我国第一部字典（）的作者是东汉的许慎。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

布尔逻辑具体检索时，是通过三个布尔运算符来实现其功能的：AND、OR、（）。