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标题: GWD-11-Q20 [打印本页]

作者: smocky 时间: 2006-1-22 20:50
标题: GWD-11-Q20

请问，A为什么不对？

GWD-5-Q38:

GWD-11-Q20:

Nitrogen dioxide is a pollutant emitted by automobiles. Catalytic converters, devices designed to reduce nitrogen dioxide emissions, have been required in all new cars in Donia since 1993, and as a result, nitrogen dioxide emissions have been significantly reduced throughout most of the country. Yet although the proportion of new cars in Donia’s capital city has always been comparatively high, nitrogen dioxide emissions there have showed only an insignificant decline since 1993.

Which of the following, if true, most helps to explain the insignificant decline in nitrogen dioxide emissions in Donia’s capital city?

More of the cars in Donia’s capital city were made before 1993 than after 1993.

The number of new cars sold per year in Donia has declined slightly since 1993.

Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993. 反

Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.

Most car trips in Donia’s capital city are too short for the catalytic converter to reach its effective working temperature.

[E]

作者: bluevironika 时间: 2006-1-22 21:28

是这样的，问题里面说，通过换新车可以减少污染，但是，新车的数量增加，但是污染还是没有减轻。

为我们怎么解释。

解释的方向，我觉得要说明新车没有起到减少污染的作用，e对。

而a里面，说了汽车的制造年份，整个跟汽车的减少污染作用没有关系，mm觉得a对，是你自己假设了这些年份制造的汽车减少污染作用不好，有个gap，是无关的。

请指教！

作者: smocky 时间: 2006-1-23 09:54

文中说：

Catalytic converters, ......., have been required in all new cars in Donia since 1993

而选项A 说:

More of the cars in Donia’s capital city were made before 1993 than after 1993

也就是说，Donia's capital city里面装这种converters的，少于没装的。其实也就是说，对空气起负面作用的那些（没装converters的车）的因素，要大于缓解空气污染的因素（装了converterss的新车)。既然负面影响占上风，自然空气污染不如预计中那样被有效缓解了。

这样一说，那么题干中给的这个"required in all new cars in Donia since 1993"，是可以和A选项结合起来，对逻辑推理起到一定作用的，而且和A选项结合起来，可以解释最终的事实：即，空气污染没有得到缓解

所以我觉得，不单单象您说的那样，只是 “说了汽车的制造年份，整个跟汽车的减少污染作用没有关系”

作者: bluevironika 时间: 2006-1-23 10:37

Catalytic converters, devices designed to reduce nitrogen dioxide emissions, have been required in all new cars in Donia since 1993, and as a result, nitrogen dioxide emissions have been significantly reduced throughout most of the country

妹妹好

文中说, converters从1993年对所有的新车已经是必须的装备了.这里我觉得车的新旧跟使用开始时间有关,跟制造年份是没有关系的 .比如,92年造的,今年卖了,我还是说这个是旧款的新车

请指教!

作者: lawyer_1 时间: 2006-1-24 11:45

要解释的矛盾是：93年后，全国多数地方的二氧化氮的排放量减少，但是，作为新车比例较高（比全国平均水平）的首都，却没有减少。　

Ａ是新的比较点。原文给的信息比较的是首都和全国：首都新车比例高，却没有全国的二氧化氮排放量减少的情况。 A比的是新车和旧车。所以什莫都解释不了。E说出首都和其他城市不同的地方，从而解释了原文的矛盾点：首都和其他城市的不同。

对于解释题，准确地把握矛盾点最重要。

作者: sandyno0425 时间: 2006-2-17 22:25
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