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【单选题】

A high negative ion count is likely to be found ______.
A.near a pond with a water pump

B.close to a slow-flowing river
C.high in some barren mountains
D.by a rotating water sprinkler
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根据网考网移动考试中心的统计,该试题:

9%的考友选择了A选项

30%的考友选择了B选项

5%的考友选择了C选项

56%的考友选择了D选项

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