输出继电器（OR）通过一对（）触点将PLC的控制信号传递给负载。

可以在（）阶段采用Make-or-buy决策分析。

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。

根据建筑物竖向荷载传递路线的不同，可将混合结构房屋的承重体系划分为（）种类型。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

对房屋等建筑物的管理，业主可以采用的方式有（）。

房屋建筑物按其结构承重形式的不同，可分为（）。