问题
单项选择题
Questions refer to the following graphs.
SALES AND EARNINGS OF COMPANY X
If Company X considered a good year to be any year in which earnings were at least 20 percent of sales，how many of the years shown were good years
答案
参考答案：C
解析： 该题是要找出对应的年份赢利(Earnings)与销售(Sales)的比值，经过简单计算，发现只有1973和1974两个年头满足要求。