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【单选题】

It has been estimated that the earth's surface temperature has increased ______one quarter to three fourths of a degree since 1850.

A.by

B.at
C.to
D.with
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根据网考网移动考试中心的统计,该试题:

75%的考友选择了A选项

14%的考友选择了B选项

6%的考友选择了C选项

5%的考友选择了D选项

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