总共两题计量 必须看下图
http://i.imgur.com/oyLpBGS.jpg
1. The time period during which the actual water level was lower than the
drought warning water level was approximately what fraction of the one-year
period shown?
(A) 1/6 (B) 1/5 (C) 7/24 (D) 3/8 (E) 5/12
请问这题是不是在问actual water level低于drought warning water level的时间
占了一整年的比例?
如果是的话 Dec 1~Jan 1 以及 Jan 1~Feb 1 这两个区间都满足
所以我的答案是2/12=1/6选A 但答案为何是C ?
2. On which of the following days did the drought warning water level
exceed the drought emergency water level by the greatest percent?
(A) March 1, 2000 (B) June 1, 2000 (C) August 1, 2000
(D) November 1, 2000 (E) February 1, 2001
题目是不是在问下列哪天drought warning water level超过drought emergency
water level的比例最多?
我看选项中的日子，warning level大约都比emergency level大了30 billions of
gallons，因此我选了D的November 1, 2000
因为在都是多了30的情况下，emergency level越低，代表涨的percent会越大
比方说A的薪水是四万 B的薪水是两万 两人同样加薪加了一万
则B的涨幅的percent会大于A
请问我的想法错在哪