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有2部機器分別產生82及85 dB之音量，請問總音壓級為多少 dB? (請輸入計到小數點後1位的數字) (a)
有4部相同機器於同一地點同時運轉之音量為100 dB，則每部之音量為多少 dB？(請輸入整數) (a)
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KG - University
self-regulation測驗
University
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