OG12 74

sayysong

74. In the past the country of Malvernia has relied heavily
on imported oil. Malvernia recently implemented a
program to convert heating systems from oil to
natural gas. Malvernia currently produces more natural
gas each year than it uses, and oil production in
Malvernian oil fi elds is increasing at a steady pace.
If these trends in fuel production and usage continue,
therefore, Malvernian reliance on foreign sources for
fuel is likely to decline soon.

Which of the following would it be most useful to
establish in evaluating the argument?

(A) When, if ever, will production of oil in Malvernia
outstrip production of natural gas?
(B) Is Malvernia among the countries that rely most
on imported oil?
(C) What proportion of Malvernia’s total energy
needs is met by hydroelectric, solar, and nuclear
power?
(D) Is the amount of oil used each year in Malvernia
for generating electricity and fuel for
transportation increasing?
(E) Have any existing oil-burning heating systems in
Malvernia already been converted to naturalgas-
burning heating systems?

答案是D。我错选了Ａ。
OG上的Situation是这么说的：
Malvernia has relied heavily on imported oil, but recently began a program to convert
heating systems from oil to natural gas. Malvernia produces more natural gas than it
uses, so it will probably reduce its reliance on imported oils if these trends continue.

我的疑问是，为什么它把原文最后一句话Fuel就理解为Oil了呢？
我就是理解为oil+natural gas+...了，所以觉得A也有道理：如果Oil的产量超过natual gas，那么现在换了heating systems就是一个错误的选择，fuel的进口将会转为natural gas。
不知道除了对单词的理解有问题，对这题有这样的逻辑分析是不是也有问题？
请高人指教！谢谢！

sayysong

嗯，是有这样的assumption.原来没有意识到~看来自己不能随便assume阿
谢谢你！

lenghongmin

那你的assumption是不是说其他对oil的使用不变呢？

sayysong

谢谢楼上，明白一些了~之所以说换了heating systems是错的，是因为如oil变多了的话，就应该继续用原来的heating systems吧

lenghongmin

这样看吧。这个文章首尾其实是呼应的。一开始讲rely heavily on imported oil，最后讲reliance on foreign source for fuel，那其实就是在指引你说这两个词是一个意思（其实本来也就是一回事）。
我不太理解你对A的理解。你怎么得出“现在换了heating systems就是一个错误的选择”这个结论的呢？
我觉得A选项其实是无关的。就算oil比natural gas产的多，你也不知道它是不是够用， 你说是不是？那又怎么能和进口挂上钩呢？