2013年GRE考试:GRE数学数据解释题型(八)
In 1970, if 5 percent of the water use was for domestic purposes, approximately what was the daily average number of gallons of water used per capita for domestic purposes? A.105 B.50 C.20 D.10 E.5 答案:A If in 1900 the water use in Country K ...