数字通信系统与模拟通信系统的传输介质是不同的。

光纤作为有线电视信号重要的传输介质，影响光纤通信系统传输距离和容量的最主要因素是（）。

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。

根据《数字移动通信（TDMA）工程施工监理规范》，以下哪些选项属于设备通电质量控制要点（）

根据《数字移动通信（TDMA）工程施工监理规范》，以下哪些选项属于线缆布放质量控制点（）

根据《数字移动通信（TDMA）工程施工监理规范》，以下哪个选项不属于设备软件与系统验收的质量控制范围内（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。