A:限制摩擦力
B:限制惯性
C:限制势能
D:限制动能
The fact that some cannot see the real person inside my body doesn't make me ____(烦恼;不悦)
如图所示,是探索教焦耳定律的实验装置,已知R1<R2,闭合开关后,通过两端电阻丝的电流I1____I2,电阻丝两端的电压U1____U2.