ChaseDream

标题: 罗技题，不理解答案，请大家指点~~ [打印本页]

作者: serenashu 时间: 2010-9-13 09:00
标题: 罗技题，不理解答案，请大家指点~~
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.the number of days with heavy rainfall was lower in 1990 than in 1910

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

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

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

不明白为什么选A，理解成每天下雨的时间要长麽？

作者: cindy796 时间: 2010-9-13 09:14
其实建议楼主去逻辑区置顶帖里找gwd的所有题讨论连接，一查就会很清楚了。
这道题是道很经典的题，它问的是it is also possible，就是下面的选项，哪个是有可能的。只有A是有可能的，因为，可能大雨的天数少，但是每天的降雨量都很大

作者: serenashu 时间: 2010-9-13 12:33
我也是这样想的，谢谢楼上的~~

作者: jsrcbj 时间: 2010-9-13 13:50
望指教：1990 light rainfall 和 moderate rainfall 都比1991少，但是total rainfall 比1991多20%
是不是可以引申出heavy rainfall 1990比较多？再怎么选择呢？

作者: onlyloss 时间: 2010-9-13 17:45
题目是问一种可能性，所以答案不一定是从题干推出来的，而是选项信息与题干不冲突的为正确答案。

这道题的题干告诉我们1990年的中雨和小雨的天数都比1910年少，但1990年的总体降雨量却比1910年多。

A选项：1990年的大雨天数比1910年的少。但大雨是大于两英尺的降雨量，并且上不封顶，所以在极端情况下，有可能大雨下一天，就能使1990年的全年降雨量比1910的多了。可见A选项和题干并不矛盾，因此为正确答案。

作者: jsrcbj 时间: 2010-9-13 18:22
了解了，谢谢

作者: 13873194104 时间: 2010-9-13 18:41
按楼上们的理解，D选项为什么不能成立呢？

欢迎光临 ChaseDream (https://forum.chasedream.com/)