When Oakland High School in California moved into a new building.the students and teachers noticed a strong smell．Then almost half of the students began to have a headache and a cough．Experts came t 题目和参考答案——青夏教育精英家教网—

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8．When Oakland High School in California moved into a new building，the students and teachers noticed a strong smell．Then almost half of the students began to have a headache and a cough．Experts（专家） came to find the cause of the sickness．Finally，they discovered that the air in the building was not safe to breathe．They were surprised to find out that the desks and chairs in the school library caused the trouble．These desks and chairs were made of particleboards（合成板）．This kind of board is cheap．It is made of very small pieces of wood held together with a chemical（化学物质）．This is just one example of a modern problem that is most common in cities-indoor air pollution（污染）．
People have worried about air pollution for many years，and the government has spent lots of money trying to clean up the air of big cities．But now we found that we are still breathing unhealthy air．A study shows：Indoor air pollution is almost two to five times（倍） worse than outside pollution．So remember to open the windows and don't stay too long in modern buildings with windows closed．

51．Many students and teachersB after they moved into the new building．
A．were very happy and excited
B．didn't feel well
C．felt tired because of hard work
52．The experts came to Oakland High School forC．
A．staying with the sick students and teachers
B．taking away the desks and chairs
C．finding the cause of the illness
53．Which of the following is NOT true according to the passage？B
A．The indoor air pollution is common in cities．
B．We needn't worry about the outside pollution．
C．The air in this school library was not safe to breathe．
54．A study shows that indoor air pollution isA．
A．even worse than the outside pollution
B．not so bad as outside pollution
C．the only problem to worry about
55．What's the main idea of the passage？C
A．Never move into a new building
B．We shouldn't buy cheap desks and chairs
C．The indoor air pollution is a big and common problem．

分析本文通过讲述加利福尼亚的一所学校的教室空气污染，从而引申到在我们的生活中的室内污染的严重性，及我们如何减少室内污染的方法．

解答答案：51．B 细节理解题．根据第一段第一行句子"the students and teachers noticed a strong smell．Then almost half of the students began to have a headache and a cough．"学生和老师注意到了一股强烈的气味，几乎一半的学生开始有头痛和咳嗽．可知许多的学生和老师感觉不舒服．故选B．
52．C 细节理解题．根据第一段第二行句子"Experts （专家） came to find the cause of the sickness．"专家们来寻找疾病的原因．可知专家们来寻找疾病的原因．故选C．
53．B 细节判断题．根据第二段第一行句子People have worried about air pollution for many years，and the government has spent lots of money trying to clean up the air of big cities．But now we found that we are still breathing unhealthy air．有人担心多年的空气污染，并且政府已经花了很多钱去清理城市的空气．但是现在我们发现，我们仍然呼吸不健康的空气．可知我们也应该关注室外污染，故选B．
54．A 细节理解题．根据第二段第二行句子A study shows：Indoor air pollution is almost two to five time（倍） worse than outside pollution．"一项研究表明：室内空气污染比室外污染严重几乎两至五倍．可知室内污染更严重．故选A．
55．C 主旨归纳题．根据整篇文章内容及其第一段最后一句This is just one example of a modern problem that is most common in cities-indoor air pollution（污染）．这只是一个问题，现代城市中室内空气污染是最常见的例子．可知室内污染已经是严重和普遍的问题．故选C．

点评在通读全文的基础上，根据全文大意，展开逻辑思维，瞻前顾后，认真观察选项，仔细推敲，确定最佳答案．

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