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.

免疫防御，免疫（）和免疫（）是免疫系统的三大功能。

免疫防御，兔疫（）和免疫（）是免疫系统的三大功能。

现代免疫学的概念认为，免疫的功能有：（）、自身稳定、（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

免疫学主要研究的是（）。免疫学主要研究的是机体能识别自身和非已，排斥异物抗原、维持机体生理平衡的一种功能。

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、（）。