Release Date:2019-03-28
我(wo)們都知道聲音有(you)大小強弱之分,可是你(ni)知道聲音是怎么(me)計(ji)量的嗎?它的單位是什(shen)么(me)?今天,就讓我(wo)們來(lai)學習聲音的計(ji)量。
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