一場大雪后,人們會感到外面萬籟俱靜,究其原因,你認為正確的是:
A.大雪后,行駛的車輛減少,噪聲減;B.大雪蓬松多孔,對噪聲有吸收作用;
C.大雪后,大地銀裝素裹,噪聲被反射;D.大雪后氣溫較低,噪聲傳播速度變慢;
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