—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
下列历代措施中，起到限制地方割据势力作用的是（ ）①汉武帝颁行“推恩令” ②唐玄宗设置节度使③宋太祖派文臣任知州 ④明太祖设“三司”
下列叙述属于铁的物理性质的是（ ）
