与CSMA/CD相比，以下针对CSMA/CA的描述，那些选项是正确的（）

IEEE 802.11标准的MAC层采用协议。A．CSMA/CA B．CSMA/CB C．CSMA/CD D．CSMA/CF

以下关于CSMA/CA的描述中，错误的是（）。

在Ethernet中采用的CSMA/CD算法比在LocalTalk协议中采用的CSMA/CA算法传输速度快（）倍。

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。

网络信息安全是一门涉及计算机科学、网络技术、通信技术、密码技术、应用数学、数论、信息论等多种学科的综合性学科。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。