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控制噪声是城市环保主要项目之一．下列哪种措施不能减弱噪声 A．市区内禁止机动车鸣笛b．减小二氧化碳气体的排放c．在汽车的排气管上装消声器 Template






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sketch 2464 Spongebob by sketchmaster
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tomski控制噪声是城市环保主要项目之一．下列哪种措施不能减弱噪声 a．市区内禁止机动车鸣笛b．减小二氧化碳气体的排放c．在汽车的排气管上装消声器 coloring
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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 template
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控制噪声是城市环保主要项目之一．下列哪种措施不能减弱噪声 A．市区内禁止机动车鸣笛B．减小二氧化碳气体的排放C．在汽车的排气管上装消声器 sketch template