1×4+69=1×6+4×9
如图(a)、(b)所示的电路中,电阻R和自感线圈L的电阻值都很小,且小于灯A的电阻,接通S,使电路达到稳定,灯泡A发光,则( )
数一数,填一填。图中有____个,____个,____个,____个。
I got on the bus and found a seat near the back, and then I noticed a man ____ (sit) at the front.