单项选择题


By approximately how many million did the mallard population decrease from 1970to 1988（）

A. 0.6
B. 2.8
C. 3.6
D. 4.3
E. 7.0

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单项选择题
In 1985 approximately what percent of all medical expenditures was paid for physician services（）

A. 20%
B. 25%
C. 30%
D. 35%
E. 40%
单项选择题
Of the following，the category that had expenditures most nearly equal to the average(arithmetic mean)expenditures per category was（）

A. refugee housing
B. emergency workers
C. post disaster assistance
D. new investments
E. cornmodities
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