往复泵适用于流量较小，扬程要求高，粘度较大的液体。

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。

理论上讲，与往复泵扬程无关的因素是（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

施工现场，是指进行工业和民用项目的房屋建筑、土木工程、设备安装、管线敷设等施工活动，（ ）场地。

从事土木工程、建筑工程、线路管道设备安装工程、装修工程的新建、扩建、改建等活动的企业称为建筑业企业。（）

建筑业企业，是指从事土木工程、建筑工程、线路管道设备安装工程、装修工程等新建、扩建、改建活动的企业。