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In each of the years 1989 and 1990, the total weight of recycled newspapers in a certain country increased by .79 million tons over the previous year.
Quantity A
Percent increase in the weight of recycled newspapers in 1989 over 1988
Quantity B
Percent increase in the weight of recycled newspapers in 1990 over 1989
A显示答案
以上解析由 考满分老师提供。
