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According to World Health Organization, how many people am killed by outdoor air

游客2024-06-13  43
问题 According to World Health Organization, how many people am killed by outdoor air pollution? [br] It found that increases in air pollution tended to ______.
选项
答案 aggravate asthma symptoms in children。
解析 根据题干定位到第四个小标题首段末句。即：空气污染的增加恶化孩子的哮喘症状，故得答案。
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