谁能帮我，关于选项取非，GWD-TN-17 19.

christinawu

是吗，我这几天才开始总结，很笨啊，有的题硬是想不通，又找不到讨论贴，快疯了。多谢好心的MM

christinawu

不好意思 ,可以再问一题吗? 是不是这些题大家都没问题，所以才没有讨论贴可以看，....

tn-19           

？38:
                        GWD-29-Q35

In Patton City, days are categorized as having heavy rainfall (more than two inches), moderate rainfall (more than one inch, but no more than two inches), light rainfall (at least a trace, but no more than one inch), or no rainfall.  In 1990, there were fewer days with light rainfall than in 1910 and fewer with moderate rainfall, yet total rainfall for the year was 20 percent higher in 1990 than in 1910.

If the statements above are true, then it is also possible that in Patton
                City

A.     A. the number of days with heavy rainfall was lower in 1990 than in 1910

B.       B.  the number of days with some rainfall, but no more than two inches, was the same in 1990 as in 1910

C.      C.  the number of days with some rainfall, but no more than two inches, was higher in 1990 than in 1910

D.      D.  the total number of inches of rain that fell on days with moderate rainfall in 1990 was more than twice what it had been in 1910

E.       E.  the average amount of rainfall per month was lower in 1990 than in 1910

 
1990年 下小雨和中雨的天数比1910少，但是 1990年总降雨量却比1910年总降雨量高20% ，那不是说明1990年下大雨的天数一定比1910年下大雨的天数要多，才会使得总雨量比1910年的高啊，可是为什么答案是A，我选的是C，，是不是理解错了。谢谢！！！

wangyi217

BC都和原文矛盾了~no more than two inches就是原文说的moderate and light rainfall呀

这道题两点很关键。先看问题问了什么：possible的原因，不是must be true~

然后要清楚：总降雨量和降雨天数不是绝对成正比的，别忘了每一次降雨的雨量啊，文中说大于2 inches的就算大雨了并没有做出限制。

比如说，90年就下了一天大雨，有10inch;1910年下了2天大雨，虽然天数较多，但每次只有3inch，这样总共还是少啊。

so tricky~

wangyi217

突然想起来这个不算举反例，反例应该是同类事物有不同结果才对

这种题目应该算是有果无因

 我想起一道和一楼那个类似的题目，分享一下~

Kernland imposes a high tariff on the export of unprocessed cashew nuts in order to ensure that the nuts are sold to domestic processing plants. If the tariff were lifted[w1]  and unprocessed cashew were sold at world market prices, more farmers could profit by growing cashews. However, since all the processing plants are in urban areas, removing the tariff would seriously hamper the government‘s effort to reduce urban unemployment over the next five years.

 

Which of the following, if true, most seriously weakens the argument?

 

A.      Some of the by-products of processing cashews are used for manufacturing plants and plastics

B.       Other countries in which cashews are processed subsidize their processing plants

C.More people in kernland are engaged in farming cashews than in processing them

      D.Buying unprocessed cashews at lower than world market prices enables cashew processors in kernland to sell processed nuts at competitive prices

   E.A lack of profitable crops is driving an increasing number of small farmers in kernland off their land and into the cities

christinawu

以下是引用wangyi217在2009-3-3 15:36:00的发言：

BC都和原文矛盾了~no more than two inches就是原文说的moderate and light rainfall呀

这道题两点很关键。先看问题问了什么：possible的原因，不是must be true~

然后要清楚：总降雨量和降雨天数不是绝对成正比的，别忘了每一次降雨的雨量啊，文中说大于2 inches的就算大雨了并没有做出限制。

比如说，90年就下了一天大雨，有10inch;1910年下了2天大雨，虽然天数较多，但每次只有3inch，这样总共还是少啊。

so tricky~

so tricky~

谢谢MM的解释，原来是这样的~~

christinawu

答案是E 对吗？

就是不管取不取消关税，urban unemployment rate 都会上升。(有果无因)

一直还搞不懂有因无果\有果无因 ,有点思路了,加油!!

经常考试

It's because if the lack of profitable crops is the reason why farmers are driven into the cities, lifting the tariff would encourage the cashew farmers to stay in rural areas for the high profits brought by selling the product at an international price, thus it would then lower the number of protential unemployed farmers into the cities.