红色发光二极管导通时的正向压降约为（）。

输出继电器（OR）通过一对（）触点将PLC的控制信号传递给负载。

自由感应衰减信号产生于射频脉冲激励自旋质子（）

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

以下哪些情况会造成提示“Incorrect number or IP address”？（）

从信号的周期性来看，有阻尼衰减的自由震动信号是有（）特性的信号。

在影像板中，能够产生光激励发光的物质是

将随时间连续变化的模拟信号变成时间上离散的脉幅调制信号，这种过程称为（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。