题目内容
（请给出正确答案）
[单选题]
在大气污染物中，能够直接刺激呼吸道的有害化学物质中，最常见的有：
A.SO2
B.NOx
C.O3
D.细颗粒物
提问人：网友iamyiyi
发布时间：2022-01-07
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A、A. With the rapid development of industrialization and urbanization of China's economy, haze appears in a large number of cities and their surrounding areas, which is considered to be one of the major realistic problems facing the sustainable development of China's social economy.
B、B. Along with the stage of China's economy entering the rapid development of industrialization and urbanization, the smog phenomenon has appeared in many cities in China and its surrounding areas, and is considered to be one of the major practical problems facing the sustainable development of China's social economy.
C、C. As China has seen rapid industrialization and urbanization, smog prevails in a large number of Chinese cities and their surrounding areas, and is considered one of the major problems threatening China’s social and economic sustainability.
D、D. With China's economy entering the stage of rapid industrialization and urbanization, smog phenomenon appears in a large number of cities and their surrounding areas in China. It is considered to be one of the major practical problems facing China's sustainable social and economic development.
