简述布尔算符（OR）的作用。

马克思主义法学的主要特点有哪些？

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.

简述公文处理工作的概念及其理解。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

收到下级机关上报的需要办理的公文，文秘部门应当进行审核。审核的重点包括（）

简述公文撰拟的特点。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。