单项选择题


If it were discovered that the import dollar amount shown for 1978 was incorrect and should have been $5.3 billion instead，then the average(arithmetic mean)import dollar amount per year for the 17 years would be how much less（）

A. $100 million
B. $53 million
C. $47 million
D. $17 million
E. $7million

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单项选择题
In 1984 the population of pintails was approximately what fraction of the mallard population（）

A.A
B.B
C.C
D.D
E.E
单项选择题
For the year shown，other than 1987，in which the percent return on shareholders’equity for Manufacturer X was most nearly equal to that for 1987，what was the percent return for all United States manufacturers（）

A.15%
B.14%
C.20%
D.17%
E.22%
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