线路计算电流Ib，导体持续允许电流Iz，断路器整定电流In，三者的关糸为（）。

半导体三极管基极电流Ib等于（）。

电压、电流的因果关系：电压是原因，电流是结果。因为导体两端加了电压，导体中才有电流，不是因为导体中通了电流才加了电压。

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。

电气设备出厂时，厂家给出的允许通过的动稳定电流峰值应大于安装处线路短路电流的（）。

熔断器熔体额定电流应不小于线路计算电流。

如果线路始端相电流的故障分量中，IC最大、IB和IA接近于零，则线路发生的故障是（）

导体中通过电流时产生的热量与电流值、电阻及电流通过导体的时间成正比。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。