A:my, to get to school
B:me, to get to school
C:my, going to school
D:me, going to school
You can't ______ it to China. ( )
如图所示,电源的内阻r=2.0Ω,电阻R=8.0Ω,开关闭合后,电流表示数I=0.30A,则电源的电动势E=____V; 在t=10s时间内,电阻R产生的热量Q=____J.