小伙伴們，GRE考試大家復(fù)習(xí)的怎么樣了呢？下面是幫考網(wǎng)分享的一些GRE考試閱讀部分的復(fù)習(xí)資料，一起來看看吧！

釋義部分：

10

Ethanol is commonly used as a gasoline supplement, but it is currently about twice as expensive as methanol, the low cost of which is one of its attractive features.

乙醇通常被用作一種汽油的補(bǔ)充，但當(dāng)前價格大概是甲醇的兩倍，價格低是甲醇的一大優(yōu)勢。

11

Methanol’s most attractive feature, however, is that it can reduce by about 90 percent the vehicle emissions that form ozone, the most serious urban air pollutant.

然而甲醇的最大優(yōu)勢，是能夠減少機(jī)動車 90% 生成臭氧的排放，臭氧是最嚴(yán)重的城市空氣污染物。

12

Like any alternative fuel, methanol has its critics.

和任何一種替代燃料一樣，甲醇也受到批評。

13

Yet much of the criticism is based on the use of “gasoline clone” vehicles that do not incorporate even the simplest design improvements that are made possible with the use of methanol.

而批評大多基于市面上的車都是燒汽油的，沒有針對可能轉(zhuǎn)而使用甲醇做出任何設(shè)計上的改進(jìn)。

(yet 當(dāng) yet 引導(dǎo)讓步關(guān)系時，可以替換為 nevertheless，引導(dǎo)被強(qiáng)調(diào)的內(nèi)容(與之相對地，although 引導(dǎo)被讓步的內(nèi)容)。

14

It is true, for example, that a given volume of methanol provides only about one-half of the energy that gasoline and diesel fuel do; other things being equal, the fuel tank would have to be somewhat larger and heavier.

的確，比如說，甲醇只能提供相同體積的汽油或柴油燃料一半的能量;其他條件相同，(燒甲醇燃料的汽車)油箱會變得更大也更重。

15

However, since methanol-fueled vehicles could be designed to be much more efficient than “gasoline clone” vehicles fueled with methanol, they would need comparatively less fuel.

然而，因為燒甲醇燃料的車可以被設(shè)計得比燒汽油的車燒甲醇更有效率，所以它們相對省油。

16

Vehicles incorporating only the simplest of the engine improvements that makes methanol feasible would still contribute to an immediate lessening of urban air pollution.

對發(fā)動機(jī)做出最簡單的改進(jìn)，使車可以燒甲醇，仍可以幫助減少城市空氣污染。

(原 that methanol makes feasible 改為 that makes methanol feasible)

問答：

1. 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

選 B

細(xì)節(jié)題。

根據(jù)句 5 - 6：

The combustion of larger molecules, which have multiple carbon-carbon bonds, involves a more complex series of reactions. These reactions increase the probability of incomplete combustion and are more likely to release uncombusted and photochemically active hydrocarbon compounds into the atmosphere.

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