对人体影响较大的常见空气污染物主要是
A．尘埃、CO2、甲醛
B．NO2、CO2、SO2
C．O3、SO2、灰尘
D．SO2、氮氧化物、可吸入性颗粒物
E．NO、NO2、尘埃
参考答案：D
解析：[解题思路] 大气污染物主要来自工业废气(氮氧化物、SO2等)、烟尘；交通工具燃料(汽油、柴油)燃烧产生的氮氧化物等废气、生活用燃料(煤)燃烧后产生的SO2等废气、烟尘，生活有机垃圾以及其他有机物腐败产生的恶臭气体等。因此大气中对人体影响较大的常见空气污染物主要是SO2、氮氧化物、可吸入性颗粒物。
| 阅读理解。 | ||||||
Here are some short messages. Please read them first carefully and find the best answers to the questions:
| ||||||
| 1. Joy got a lot of _______ yesterday. | ||||||
| A. letters B. books C. information D. e-mails | ||||||
| 2. What is "The Fugitive"? | ||||||
| A. A book. B. A film. C. A song. D. A game. | ||||||
| 3. What did Mr. Brown do for Joy? | ||||||
| A. He examined her car. B. He wanted to buy her car. C. He prepared dinner for her. D. He found a new brand of dog food. | ||||||
| 4. What are Loy and Luckey? | ||||||
| A. A man and a dog. B. A man and a woman. C. Two kinds of food. D. Wu's and Wang's dogs. | ||||||
| 5. Who of the following persons is probably a member in Joy's family? | ||||||
| A. Helen. B. Wu. C. Sue. D. Carl. |