【简答题】实际电路元件与理想电路元件的区别是______。
【简答题】(2)电路中的滑动变阻器对电路起保护作用.因此开关闭合前,其滑片应移到最_______端(填“左”或“右”);实验过程中,滑动变阻器还有另一个作用是_______
【简答题】下面这些图形分别是从哪个方向上看到的,请你填一填.
【多选题】The following services( )are performed by the forwarder on behalf of the exporter.
C.
expotr customs clearance
D.
import customs clearance
【简答题】Which sentence is better in the following? Why?A. It was on the day following university graduation that I commenced the task of locating employment. B. It was on the day following university graduati...