—Michael was late for Mr. Smith's chemistry class this morning.
—________? As far as I know, he never came late to class.
A:So what
B:Why not
C:Who cares
D:How come
甲、乙两灯分别标有“6V 6W”、“6V 3W”字样,现将两灯接入同一电路中使用,则下列说法正确的是(不计温度对灯丝电阻的影响)( )