危险货物办理站是指站内、专用线、（）办理危险货物发送、到达业务的车站。
参考答案：专用铁路
— I don't want to move to that city. It is heavily polluted.
— Pollution is common. The city here is ________. [ ]
A. no less clean
B. not cleaner
C. no cleaner
D. not less clean
下列属于合金的是（ ）
A．黄铜
B．黄金
C．石墨
D．氧化铁
