A:该电源的电压为24 V
B:电路中的电流为3 A
C:两灯泡的总功率为32 W
D:灯L1的实际电压大于灯L2的实际电压
Most parents forbid their children_______ much time ______ TV. They think it's a waste of time.
如图是一个无盖圆柱形塑料桶示意图(单位:分米)