数据模型定义了数据库应用系统数据的组织、存储与管理必须遵循的规范。关于各种数据模型，下列说法错误的是

口服补液及时纠正脱水，应用ORS，说法正确的是（）

下列关于概念数据模型的说法，错误的是______。

下列关于概念数据模型的说法，错误的是（ ）。

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。

关于ExCel的数据库应用，下列说法中错误的是（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。