单选题:两人轻声谈话的声强级为40dB,热闹市场上噪声的声强级为80dB,市场上噪声:与轻声谈话的声强之比为( )。 题目分类:公共基础 题目类型:单选题 号外号外:注册会员即送体验阅读点! 题目内容: 两人轻声谈话的声强级为40dB,热闹市场上噪声的声强级为80dB,市场上噪声:与轻声谈话的声强之比为( )。 A.2 B.20 C.102 D.104 参考答案: 答案解析:
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Why does the teacher call the exam comprehensive? Why does the teacher call the exam comprehensive?A.It will be easy to understand 分类:公共基础 题型:单选题 查看答案
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