XDF逻辑&数学教程里的267题

jerryqwu

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

答案是A

可是我怎么觉得如果A的lower改为higher才正确啊?

另外，fewer 和 lower 都是同指天数少吗，在这里不用考虑一天内下的雨量持续的时间长短吗? 谢谢NN们指点

yangxiaogang

答案是A,没有问题， 请注意possible

davidchow

fewer,lower是指代天数没错。文章的结论是1990的雨量大于1910的雨量，文章的前提是1990mr,lr的天数少于1910，但下雨的天数和雨量没有确定的关系，理解到这层意思，答案a就不难理解了。

steveyangxt

以下是引用davidchow在2005-12-9 12:59:00的发言：

fewer,lower是指代天数没错。文章的结论是1990的雨量大于1910的雨量，文章的前提是1990mr,lr的天数少于1910，但下雨的天数和雨量没有确定的关系，理解到这层意思，答案a就不难理解了。

请解释为什么下雨的天数和雨量没有确定的关系， 文中天数是用每天的下雨量区分的， 我认为有关系阿