The good news quickly in our school and we all know it now.
A:developed
B:passed
C:spread
写出反义词
生气—____ 左—____ 不紧不慢—____
如图所示,电源电压U=10V,定值电阻R=20Ω,闭合开关S,电压表的示数是6V,通过小灯泡的电流是( )