单项选择题





For the two years in which earnings from electronic operations were most nearly equal，the combined earnings from nonelectronic operations were most nearly（）

A. $340 million
B. $520 million
C. $670 million
D. $780 million
E. $1，520 million

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单项选择题
From 1968 to 1980，the size of the labor force increased by approximately what percent（）

A. 20%
B. 21%
C. 27%
D. 73%
E. 80%
单项选择题
Which of the following statements about state and local government employees can be inferred from the data（） Ⅰ Fewer than of those in paraprofessional occupations were males． Ⅱ There were more than 5 times then umber of females in the technical occupations as in the skilled craft occupations． Ⅲ There were more than 6 times the number of females in the professional occupations as in the official administrative occupations．

A. Ⅰ only
B. Ⅱ only
C. Ⅰ and Ⅱ only
D. Ⅱ and Ⅲ only
E. Ⅰ，Ⅱ and Ⅲ
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