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  3. The noise of a leaf blower is louder in America than that in New Zealand. [br] A

The noise of a leaf blower is louder in America than that in New Zealand. [br] A

游客2023-08-30  9
问题 The noise of a leaf blower is louder in America than that in New Zealand. [br] According to Bob Bernhard, in order to reduce road noise, people must change ______.
选项
答案 the road surface
解析 定位到文章第九段首句；可知工程师Bob Bernhard认为减少道路噪音的方法不是更换轮胎而是改变路面状况。
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