GWD-27-Q7中that后面emitted…的成分是什么？求NN解惑！

葵3号

202.        (31980-!-item-!-188;#058&006267)        (GWD-27-Q7)

Providing initial evidence that airports 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.

A. as much as that which is being emitted annually by all

B. as much annually as is emitted by the

C. as much compared to what is annually emitted by all

D. that emitted annually by all

E. that emitted annually compared to the

D项中emitted是做后置定语吗？That这里是什么成分呢，求NN帮分析～^_^

287151319

twice + 抽象名词直接表示倍数，that指代pollutant

葵3号

287151319 发表于 2015-1-18 13:13
twice + 抽象名词直接表示倍数，that指代pollutant

明白啦，是不是就是曼哈顿上的说的那条，that 指代前面名词的 new copy~