请教大全164

hxy_han · 发表于 2005-9-14 16:03:00

1. Because natural gas is composed mostly of methane, a simple hydrocarbon, vehicles powered by natural gas emit less of certain pollutants than the burning of gasoline or diesel fuel.

(A) less of certain pollutants than the burning of gasoline or diesel fuel

(B) fewer of certain pollutants than burning gasoline or diesel fuel do

(C) less of certain pollutants than gasoline or diesel fuel

(D) fewer of certain pollutants than does burning gasoline or diesel fuel（E）

(E) less of certain pollutants than those burning gasoline or diesel fuel

疑问:pollutant解释为"污染性物质"时应是不可数名词,不知这里为何可以用pollutants,请指点

joe11 · 发表于 2005-9-14 20:54:00

pollutant

[countable] 可数名词

SG a substance that makes air, water, soil etc dangerously dirty, and is caused by cars, factories etc

air/environmental/water etc pollutants

New regulations will reduce hazardous air pollutants.

a dumping ground for toxic pollutants

chemical/industrial etc pollutants

industrial pollutants in the lake

hxy_han · 发表于 2005-9-15 18:37:00

谢谢你的指点

不过我在英汉大字典上查到这样的一个例句:

They pour tons of pollutant into the atmosphere.

我想如果pollutant可数,这里是不是应该用pollutants?

请教大全164