A:lied; lied
B:lied; lay
C:lays; lay
D:lies; laid
如图1所示是电阻R1与滑动变阻器R的电路图,电源电压为12V,电阻R1的I﹣U图象如图2所示.开关闭合后,滑动变阻器R接入电路的阻值为40Ω时,求:
—Yes. M-A-P, map.