计算机网络中，通信双方必须共同遵守的规则或约定，称为协议。

已知X=21，Y=15，Z=22，计算表达式（（X>Y）or（Y>Z））and（（X<><>

在计算机网络中要实现两台计算机之间互相通信并交换信息，必须遵循一系列被称为（）的通信规则。

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。

计算机网络中，通信双方必须共同遵守的规则或约定，称为协议。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

计算机网络体系是管理两个实体之间通信规则的集合。