A:电动机两端的电压为0.03V时通过电动机的电流一定为0.01A
B:正常工作时电动机的电功率为3W
C:正常工作时电动机线圈的发热功率为0.2W
D:正常工作时电动机的机械功率为2.8W
—Yesterday , my father bought me a new mobile phone as a present , but I don't know how to use it.
—Why not read the ________ first before using it ?
下列概念中,具有从属关系且从大到小依次排列的是( )