在数据库设计中，客观存在并相互区别的事物称为（）。

正确错误客观存在且可以相互区别的事物称为实体。

在数据库的概念设计中，客观存在并且可以相互区别的事物称为（）

可以在（）阶段采用Make-or-buy决策分析。

在实际应用中，数据库设计得到关系数据模型只需要满足（）条件就可以了

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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。