Release Date:2019-03-28
我們都知道聲音有大小強(qiáng)弱之分,可是你知道聲音是怎么計(jì)量的嗎?它的單位是什么?今天,就讓我們來(lái)學(xué)習(xí)聲音的計(jì)量。
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