国家对烟草专卖品的生产、销售、进出口和运输实行行政许可制度。
参考答案：对
在小电流接地系统中，发生金属性接地时接地相的电压()。
A.等于零
B.等于10kV
C.升高
D.不变
Turkey opened the world's first trans-continental underwater rail tunnel．＿Asia and Europe on 29 October, 2013,＿closer the day when it will be possible to travel from London to Beijing via Istanbul by train.
A．connected; brought
B．connected; bringing
C．linking; brought
D．linking; bringing
