Either the Greek or the Australian ________ the boxing competition.

A．have won

B．has won

C．are won

D．is won

在特别潮湿及严重污秽等恶劣环境下，隧道内接触网回流线距接地体的静态间隙困难值为（）。

A、50mm

B、75mm

C、160mm

D、200mm