国际标准化组织ISO所提出的信息系统安全体系结构中定义了（）种安全服务。

OSI安全系结构定义了哪五类安全服务？

根据管理信息系统的定义，可以总结出管理信息系统建设的两个最主要的内涵，即管理信息系统是一个（）；管理信息系统是一个（）。

BLP模型对安全系统的定义中，分别定义了（）

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。

在OSI系统管理中，管理信息定义为（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。