噪声是当代社会的公害之一噪声的控制可分为三个方面如图所示的情景中在声源处防止噪声产生的是图防止噪声进入人耳朵的是图另一图是在 Sketch Coloring Page

噪声是当代社会的公害之一噪声的控制可分为三个方面如图所示的情景中在声源处防止噪声产生的是图防止噪声进入人耳朵的是图另一图是在 Template

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