输出继电器（OR）通过一对（）触点将PLC的控制信号传递给负载。

口服补液及时纠正脱水，应用ORS，说法正确的是（）

当基站发现上行测量的SIR值低于目标SIR值，则通过下行的TPC命令终端（）发射功率

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.

在直放站工程中，下行信号会对基站产生干扰（下行干扰上行），主要原因是（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

什么是上行信息、下行信息、上行信道及下行信道？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。