是我自己理解的问题么？？？ moderate和light数量都少了，总的降雨量却上升了，那不就是 heavy的数量上升了么！！！ 怎么会选择AAAAAA？？？？ 求指导！！！
In Patton City, days arecategorized as having heavy rainfall (more than two inches), moderate rainfall(more than one inch, but no more than two inches), light rainfall (at least atrace, but no more than one inch), or no rainfall. In 1990, there were fewer days with lightrainfall than in 1910 and fewer with moderate rainfall, yet total rainfall forthe year was 20 percent higher in 1990 than in 1910. If the statements aboveare true, then it is also possible that in Patton City
- the number of days with heavy rainfall was lower in 1990 than in 1910
- the number of days with some rainfall, but no more than two inches, was the same in 1990 as in 1910
- the number of days with some rainfall, but no more than two inches, was higher in 1990 than in 1910
- 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
- the average amount of rainfall per month was lower in 1990 than in 1910
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发表于 2013-10-7 10:57:04
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