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人們在不同場合使用手機時需要選擇不同的音量，改變音量是改變了聲音的____；當你接聽電話時，一般能夠知道對方是熟人還是陌生人，這是根據聲音的_____進行判斷的．（填“音調”、“音色”或“響度”）

解析:
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