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【题目】Outdoor air pollution is an obvious danger because its hard to miss.Auto gases, industrial waste, city smogeveryone knows theyre a health hazard(危险) and a call for solutions is on everyones lips.But theres another threat just as perilous a hidden threat(威胁) we are usually unaware of.Were speaking about the threat of indoor air pollution.

The dangers caused by indoor air pollution are too often underestimated(低估) and overlooked.According to a recent study, indoor air pollution can be many times higher than outdoor air pollution.A similar study by the Environmental Protection Agency shows that, in general, the air in our homes and offices is two to five times more polluted than outdoor air.

Scientific studies have found that indoor air pollution exacerbates(恶化) the symptoms of asthma(哮喘), and contributes to causing nausea(恶心), headaches and damage to the central nervous system.Evidence has even been found linking poor indoor air quality to certain cancers.Children who spend eighty percent of their time inside are particularly affected by indoor air pollution.

Cigarette smoke, chemical fertilizers(肥料), perfumes and clothing that has been dry-cleaned may contribute to indoor air pollution.Building materialsincluding paint and glueare also contributors.

And homes arent the only indoor areas affected by this danger.Offices are affected toosometimes more sowith their copy machines and printers, inks and processing solutions (显影液)and so on.

Fortunately there are many ways to reduce indoor air pollution and improve indoor air quality in your home and office.A major first step would be the use of an air purifier(净化器).

【1What does the underlined word perilous mean?

A.Nervous. B.Similar. C.Obvious. D.Dangerous.

【2】The author mentions some studies in Paragraph 2 to show indoor air pollution__________.

A.is recently overestimated

B.is very common and serious

C.has drawn peoples attention

D.is linked to many serious diseases

【3Which of the following is the usual contributor of air pollution in our homes?

A.Smoking. B.Printing.

C.Copy machines.D.Processing solutions.

7.【4What would be discussed in the paragraph that follows?

A.An introduction to the air purifier.

B.Other dangers of indoor air pollution.

C.Other sources of indoor air pollution.

D.More solutions to the problem of air pollution.

【答案】

【1】D

【2】B

【3】A

【4】A

【解析】

试题分析:本文是一篇说明文,通过对比户外污染说明了室内污染的普遍和严重,并且提出了应对措施,比如使用空气净化器。

【1】细节理解题。根据第一段的But theres another threat just as perilous a hidden threat(威胁) we are usually unaware of.可知perilous可以造成一种潜在的威胁。故此题应选D。

【2】细节理解题。根据第二段的The dangers caused by indoor air pollution are too often underestimated(低估) and overlooked.According to a recent study, indoor air pollution can be many times higher than outdoor air pollution.A similar study by the Environmental Protection Agency shows that, in general, the air in our homes and offices is two to five times more polluted than outdoor air.可知室内污染既普遍又严重。故此题应选B。

【3】细节理解题。根据第四段的Cigarette smoke, chemical fertilizers(肥料), perfumes and clothing that has been dry-cleaned may contribute to indoor air pollution.可知常见的室内污染中有吸烟引起的污染。故此题应选A。

【4】推理判断题。根据最后一段的Fortunately there are many ways to reduce indoor air pollution and improve indoor air quality in your home and office.A major first step would be the use of an air purifier(净化器).可知作者接下来会介绍空气净化器的一些信息。故此题应选A。

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