铅套管电缆直通头接续时，7x4电缆甲端电缆外护套到已端电缆外护套距离是（）。
A.530mm
B.540mm
C.550mm
D.560mm
参考答案：D
–Is the modern racing car outside ______, Lucia?
--Of course not. Nobody but Jim can afford such an expensive car. It must belong to ______.
A．your, his
B．yours, he
C．your, him
D．yours, him
造成30人以上死亡，为（）事故。
A、特别重大
B、重大
C、较大
D、一般
