问题
单项选择题
NUMBER OF FARMS IN THE UNITED STATES,
The average acreage per farm was approximately 140 in 1910 and 220 in 1950. The ratio of the total farmland acreage in 1910 to the total in 1950 was most nearly ？（）
A.A
B.B
C.C
D.D
E.E
答案
参考答案：A
解析：
由图可知1910年农场总数为6.4million，1950年农场总数为5.4million，因此两者面积之比等于(6.4×140)/(5.4×220)=0.752。