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一场大雪后,人们会感到外面万籁俱静,究其原因,你认为正确的是:
A.大雪后,行驶的车辆减少,噪声减小;B.大雪蓬松多孔,对噪声有吸收作用;
C.大雪后,大地银装素裹,噪声被反射;D.大雪后气温较低,噪声传播速度变慢;
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