管理信息系统的分类有多种方式和方法，如果按管理信息系统发展的整个历程来进行分类，就有（）类。

在计算机网络系统中，数据加密方式有（）、（）和（）等三种。

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。

端到端加密方式是网络中进行数据加密的一种重要方式，其加密、解密在何处进行? ______。

端到端加密方式是网络中进行数据加密的一种重要方式，其加密、解密在何处进行？

（ 47 ）端到端加密方式是网络中进行数据加密的一种重要方式，其加密、解密在何处进行？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。