客户信息认证用于鉴别用户身份，保证通信双方身份的真实性。

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.

双向身份认证是指移动用户与移动通信网络之间相互认证身份。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

LTE系统的中下列哪个网元不承载用户面数据?( )

下列哪个不是LTE切换技术特点：

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

按用户上网是否通过认证服务器认证，可将用户上网方式分为（）。