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

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

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

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

4. 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

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

答案是A. 想不明白.最先排除的就是A.小雨和中雨的天数都比1910少,而雨量又是1990比1910大,应该1990的大雨天数多才对啊

这道题前人有过讨论的.楼主可以搜一下.

主要是注意原文里的"降水量和降雨天数没关",不要把它们弄混了.A的情况是有可能发生的.其它几个都从原文推不出来.

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

千万注意：题目问的是可能性possible，而非可以推导的必然性conclusion

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

1910年有10天 Heavy, 每天是3 inches, 1990有5天 Heavy, 每天是30 inches..问题解决了, 虽然天数少, 但是降水多。这就是一种可能性！

H情况是水量没有封顶的，所以各种情况都可能……阴险题目啊……

M定义为 1<M<2, 如1910年都比 1 inches多一点点, 哪怕无限接近1,

我的理解是

设1990的moderate总降水量total number of inches1*M1(天数*moderat降水量）

1910年的总降水量total number of inches：D2*M2

如果我们设1990年和1910年降雨天数是一样的话~而M的取值之能在 1〈M〈=2，

所以1990的moderate降水量永远都不可能是1910年的2倍！！！

更何况题目中的1990年的天数还小于1910年呢！