简述布尔算符（OR）的作用。

名词作状语，是指（）名词、（）名词和（）名词直接用于动词前作状语，并不是包括名词同介词组成（）作状语的情况。

汉语名词没有数的变化，所以汉语没有区别单数和多数的概念。

语文教师的语文专业知识包括现代汉语、古代汉语、写作学和文学、（）。

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。

简述象征型文学与现实型、理想型文学的区别。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。