标题: 请教gwd 27 Q7 [打印本页] 作者: lyl1123 时间: 2013-1-27 15:11 标题: 请教gwd 27 Q7 Providing initial evidence that airport are a larger source of pollution than they were once believed to be, environmentalists in Chicago report that the total amount of pollutant emitted annually by vehicles at O’Hare International Airport is twice as much as that which is being emitted annually by all motor vehicles in the Chicago metropolitan area.
as much as that which is being emitted annually by all
as much annually as is emitted by the
as much compared to what is annually emitted by all
作者: lyl1123 时间: 2013-1-27 20:24
up作者: TerraceHo 时间: 2013-1-28 13:54
that指代the amount of pollutant 代入,twice the amount of pollutant emitted annually compared to the vehicles in chicago