● 网络维护管理有五大功能，它们是网络的失效管理、网络的配置管理、网络的性能管理、(59)、网络的计费管理。

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

网络配置管理方案主要注重网络自动（）；（）和设备管理，网络配置工具由设备供应商提供及第三方公司提供。

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.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

在Internet中，对网络、设备和主机的管理叫做网络管理，网络管理信息储存在（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。