单选题 Questions refer to the following graph.
AVERAGE COSTSOF OPERATING SUBCOMPACT, COMPACT, AND MIDSIZECARS IN THE UNITED STATES, 1982～1986

单选题 In 1982 the approximate average cost of operating a subcompact car for 10,000 miles was

A
B
C
D
E

【正确答案】 B

【答案解析】[解析] 条形图的纵坐标是在当年买的新车运行10,000英里时平均每英里的运行成本，从图中可以看出微型汽车(图中的实心黑色条)在1982年每英里的运行成本是0.34美元，所以其10,000英里的平均运行成本是3,400美元。

单选题 In 1984 the average cost of operating a subcompact car was approximately what percent less than the average cost of operating a midsized car?

A
B
C
D
E

【正确答案】 C

【答案解析】[解析] 从图中可以看出在1984年开一辆微型汽车每英里的平均成本是0.36美元，而开一辆中型汽车每英里的平均成本是0.48美元。根据题意可得：[*]

单选题 For each of the years shown, the average cost per mile of operating a compact car minus the average cost per mile of operating a subcompact car was between

A
B
C
D
E

【正确答案】 D

【答案解析】[解析] 从图中可以看出微型汽车的平均每英里成本从1982年到1986年呈逐年增加之势，而小型汽车的成本则在0.45美元附近，他们之间的差值在1982年最大，大约为0.12美元，在1984或1985年最小，大约为0.06美元。