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【单选题】

According the experts, when headset sound reaches 110 decibcls, it can be used at most for ______.
A.one hour

B.two hours
C.half an hour
D.three hours
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根据网考网移动考试中心的统计,该试题:

2%的考友选择了A选项

85%的考友选择了B选项

4%的考友选择了C选项

9%的考友选择了D选项

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