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What can we infer from the passage?
A.Over the last two decades, colleges altered the composition of their work force.
B.In the past twenty years, the number of full-time instructors increased by 630,000.
C.All the managerial positions added during the period from 1987 to 2007 were full time.
D.There were altogether 614,000 teaching positions in the United States in 2007.

A.Over
B.
B.In
C.
C.All
D.
D.There
E.


【参考答案】

A
推理判断题。A“过去20年里大学的人员构成发生了变化”,这与文章内容相符,由第一段可知后勤人员、教师和管理人员的数量有了不同程度的增长,而从第七段第一句可知,在过去20年里产生了一些新的后勤岗位,这都说明人员构成发生了变化。B“过去20年里全职讲师的人数增加了63万人”,这与文章倒数第二......

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