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。

按照作用原理，泵可分为动力式泵类、容积式泵类及其他类型泵。下列属于动力式泵的有()。

在氨碱法生产纯碱中，吸氨的过程会发生（）变化。

纯碱工业产品纯度一般为98—99%，依颗粒大小，堆积密度不同，可分为超轻质纯碱、轻质纯碱和重质纯碱，轻质纯碱其大致范围为（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

什么是清液及什么是清液高度？

对某化工厂清釜工体检发现肝、脾大者多例，肝癌1例，此化工厂最可能生产（）