The Meglev Train travels in a vacuum between two magnets, ___ no pollution is c

题干

The Meglev Train travels in a vacuum between two magnets, ___ no pollution is caused and less energy is consumed.

A．where

B．which

C．when

D．therefore

上一题下一题 0.64难度单项选择更新时间:2013-01-10 08:51:06

小学学科试题库

初中学科试题库

高中学科试题库