①炎帝 ②黄帝 ③尧 ④舜
A:①②
B:②③
C:③④
D:①④
如图所示,在探究并联电路中各支路电流之间的关系时,小明同学用电流表测出A、B、C三处的电流分别为IA=0.5A,IB=0.3A,IC=0.2A,在表格中记录数据后,下一步应该做的是( )
— Thanks. But I watched it _______. It was really moving(令人感动的).