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题目材料：
From 2005 to 2017, the average (arithmetic mean) increase per year in the number of part-time employees in the 42-and-over age-group was how much greater or less than that for the number of full-time employees, rounded to the nearest $$0.1$$?
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A.1.0 greater
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B.0.9 greater
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C.0.9 less
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D.0.8 greater
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E.0.8 less
C显示答案
