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标题: [原创] SC855 -Section11-16 [打印本页]

作者: newbee 时间: 2003-9-21 01:03
标题: [原创] SC855 -Section11-16
16.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) less of certain pollutants than those burning gasoline or diesel fuel
答案是E,本人选B.
pollutant是不可数名次吧，可是为什么要加s呢？
麻烦哪位大虾帮忙解答一下，谢谢！

作者: merlion 时间: 2003-9-21 08:58
pollutant 可以是可数的把。pollutant ：something that pollutes, especially a waste material that contaminates air, soil, or water.

885 SEC 8
2. Often visible as smog, ozone is formed in the atmosphere from hydrocarbons and nitrogen oxides, two major pollutants emitted by automobiles, react with sunlight.
(A) ozone is formed in the atmosphere from
(B) ozone is formed in the atmosphere when
(C) ozone is formed in the atmosphere, and when
(D) ozone, formed in the atmosphere when
(E) ozone, formed in the atmosphere from

16题中用LESS表量多少，不表种类多少。

if i am wrong, let me know.

作者: newbee 时间: 2003-9-21 11:07
因为天然气主要由一种叫做methan的碳水化合物构成，使用天然气的交通工具比燃烧汽油和柴油的交通工具排放更少的特定污染物。
哦，答案是可以选出了。
可是疑问还有：
既然是可数，为什么要用less 而不是fewer?

作者: merlion 时间: 2003-9-21 11:14
Less表污染物量多少， fewer表污染物种类多少，此题要比较量的多少，所以用LESS. 不知理解的对不对。

作者: juningw 时间: 2005-10-19 10:07

以下是引用merlion在2003-9-21 8:58:00的发言：
pollutant 可以是可数的把。pollutant ：something that pollutes, especially a waste material that contaminates air, soil, or water.

885 SEC 8
2. Often visible as smog, ozone is formed in the atmosphere from hydrocarbons and nitrogen oxides, two major pollutants emitted by automobiles, react with sunlight.
(A) ozone is formed in the atmosphere from
(B) ozone is formed in the atmosphere when
(C) ozone is formed in the atmosphere, and when
(D) ozone, formed in the atmosphere when
(E) ozone, formed in the atmosphere from

16题中用LESS表量多少，不表种类多少。

if i am wrong, let me know.

英雄所见略同啊～

刚刚理解，就看见了你的帖子。。。爽！

作者: 无尾小恶魔 时间: 2005-11-6 11:58

刚查过字典，pollutant是变化名词（variable noun),可以加s,也可以不加，两者都是一样的。区别的时候根据逻辑判断是抽象名词的即为不可数~所以我觉得这道题跟less 没有关系

更况且，less of后面是一定要跟不可数名字或者名词的单数形式，字典可是这样说的。

作者: xjlv128 时间: 2006-5-9 15:37

以下是引用merlion在2003-9-21 11:14:00的发言：
Less表污染物量多少， fewer表污染物种类多少，此题要比较量的多少，所以用LESS.

较真的话，因为是一种简单的化合物构成的，所以说排放的种类少也未尝不可阿……

作者: soloenti 时间: 2006-8-4 23:51
好像fewer of不要選這是我的作法至於為什麼等nn來幫忙吧

作者: CarrieLee789 时间: 2006-8-25 20:31

白勇的書中p.193解釋：

emit less of pollutants, less of（較少地）向前修飾動詞emit，而不是向後修飾名詞pollutants.

另外，我有個問題

為什麼does不用重複？

作者: yboo 时间: 2006-8-25 21:26
agree with carrielee. i member that "less of" means "smaller in degree", acting like an adverb. so it really doesnt mater whether the noun that followes is singular or plural.

作者: abort 时间: 2006-12-20 02:14
感觉这里的less是做名词，跟fewer没什么关系吧。而且less of certain pollutants than比较的是pollutants的多少，而不是emit pollutants的多少，所以没必要补上动词do，如果题目是 vehicles powered by natural gas emit less certain pollutants than 的话than后面就应该补上do vehichles powered by...因为emit这个动作是vehicle做的，请nn指正

作者: tigerlulu74 时间: 2007-12-29 01:03

16.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) less of certain pollutants than those burning gasoline or diesel fuel

1\在金山词霸上可看出，less有名词形式，而fewer无名词形式。介词of前应该是名词，所以只有less of,而不应该有fewer of.所以B和D应排除。

less                                    fewer
n.                                      int.
较少, 较小                              较少数
adj.                                    adj.
少的, 小的                              较少的
adv.
较少地, 更小地, 不及
prep.
减去

2\只要不引起歧义，不补谓语do也可以。本题从逻辑上看不会引起岐义，所以可不补do

3\比较对象要对等。比的是vehicles (powered by natural gas) emit less of...than those=vehicles (burning gasoline or dielel fuel)

作者: weihua89 时间: 2007-12-29 11:43

1。less of可以跟单数，复数，不可数均可。

2。b最明显的错误：比较的对象不对。原题说的是烧天然气的车与烧汽油和柴油的车相比，而b说的是烧天然气的车与汽油和柴油的燃烧相比。肯定不对嘛

作者: lijiahui0422 时间: 2008-11-12 20:06
不知道到底什么时候该省略动词，但从没有歧义这一点判断太飘忽了

作者: 侯子的西游记 时间: 2010-6-3 10:37
less在这里应该是adv，见Collins字典里的举例用法，同这个例子很类似：
5 ADV ADV with v

If you do something less than before or less than someone else, you do it to a smaller extent or not as often.
We are eating more and exercising less...
I see less of any of my friends than I used to.

(c) HarperCollins Publishers 2006

作者: michaelcrm 时间: 2010-6-12 15:02
less of/fewer of ?
类似pollutant, chemical的词即可作可数名词表种类，也可作不可数名词表量的多少。
题中的certain pollutants已经确定了污染物的种类，因此pollutant在此表示“每种污染物的量多少”，作不可数名词，因此应用less of

并且，A和C中都存在比较对象的明显错误，而E没有比较错误，并且保持了平行结构，因此选E。

有同学问到为什么E中没有do，值得注意的是，这种比较结构中的do/be是可以省略的。当不省略时，一般都会前置倒装，紧跟than之后。相反，如果than 与 do/be 之间相隔老远，阅读起来就很困难了。

作者: 红尘道士 时间: 2010-6-12 17:04
http://forum.chasedream.com/GMAT_SC/thread-32240-1-1.html
这里论述的比较清楚

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