1.This question refers to the graph above. In the question all references to gasoline prices and taxes refer to average prices, including tax, and average taxes, in United States dollars. On June 1,1989.

If the tax per gallon of gasoline in Canada were doubled and the increase in tax added to the price per gallon of gasoline, what percent of the resulting price per gallon percent of the resulting price per gallon would the tax then be?

A.36%

B.50%

C.64%

D.75%

E.90%

答案：C

2.The average acreage per farm was approximately 140 in 1910 and 220 in 1950. The ration of the total farmland acreage in 1910 to the total in 1950 was most nearly

A.3/4

B.2/3

C.3/5

D.1/2

E.2/5

答案：A