问一道高频阅读题---乙醇汽油

fayehyfUID：3476681

问一道阅读题，出处是26篇阅读机井，第一篇乙醇汽油，听说这题昨天也考了。

第三题

1.3. The passage suggests which of the following about air pollution? (A) Further attempts to reduce emissions from gasoline-fueled vehicles will not help lower urb an air-pollution levels. (B) Attempts to reduce the pollutants that an individual gasoline-fueled vehicle emits have be en largely unsuccessful. (C) Few serious attempts have been made to reduce the amount of pollutants emitted by gas oline-fueled vehicles. (D) Pollutants emitted by gasoline-fueled vehicles are not the most critical source of urban air pollution. (E) Reductions in pollutants emitted by individual vehicles have been offset by increases in po llution from sources other than gasoline-fueled vehicles.

为什么A不对呢？

1吃辣椒UID：3159600

我看答案好像是A。
我昨天好像选的B。。。。。。。。。

Sheldon_CooperUID：3386930

答案就是A啊亲

fayehyfUID：3476681

Sheldon_Cooper 发表于 2013-10-20 15:25
答案就是A啊亲

我错了。。。我贴错题了，我是想问第二题，这道题我想选A和B的，我觉得这两个都对啊，但是答案是B

1.2. According to the passage, incomplete combustion is more likely to occur with gasoline than with an alternative fuel because
(A) the combustion of gasoline releases photochemically active hydrocarbons
(B) the combustion of gasoline involves an intricate series of reactions
(C) gasoline molecules have a simple molecular structure
(D) gasoline is composed of small molecules.
(E) gasoline is a carbon-based fuel

Sheldon_CooperUID：3386930

fayehyf 发表于 2013-10-21 09:41
我错了。。。我贴错题了，我是想问第二题，这道题我想选A和B的，我觉得这两个都对啊，但是答案是B

1.2 ...

首先题目强调的是incomplete combustion
A选项说的是releases photochemically active hydrocarbons 这个在原文中说的是一个incomplete combustion 发生之后产生的一个结果，但是要明白出现这个结果不一定是有incomplete combustion 所造成的，所以这个选项存在不确定性。
B选项，原文正好提过The combustion of large  molecules, which have multiple carbon- carbon bone, involves a more complex(选项中被替换成了intricate) series of reactions. These reaction(即前面一句话提到的complex series of reactions)increase the probability of incomplete combustion.
其实本题目就是考察一个intricate和complex的同意替换。