在搜索引擎中输入检索式：“公司OR企业”表示检索结果（）

万方数据库使用布尔逻辑算符anD./or/not.其中A.anD.B表示（）。

全文检索服务是利用全文数据库而开展的一项服务活动，它向用户提供全文，从而避免书目型数据库所带来的再次查找源信息的过程。

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。

利用书目文献数据库、全文数据库对课题相关知识点、事实和文献进行检索，属于论文引文检索法。

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、（）。