输出继电器（OR）通过一对（）触点将PLC的控制信号传递给负载。

市政排水管道和底层埋地排水管道的成品保护控制措施有哪些？

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.

下列关于测量控制桩移交与复核记录（渝市政竣-15）的说法正确的是（）：

下列关于市政公用施工项目质量控制规定的说法中，正确的有（　　）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

市政公用工程场站建（构）筑物的平面控制网，宜布置成建筑（　　）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。