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题目内容
In 1988 Mr.Smith's annual income was greater than Mrs.Smith's annual income.In 1989 Mr.Smith's annual income decreased by ppercent.whereas Mrs.Smith's annual income increased by p percent.p>0
Quantity A
Mr.and Mrs.Smith's combined annual income in 1988
Quantity B
Mr.and Mrs.Smith's combined annual income in 1989
A显示答案
以上解析由 考满分老师提供。