Question

For years scientists have been worried about the effects of air pollution on the earth’s natural conditions. Some believe the air inside many houses may be more dangerous than the air outside. It may be one hundred times worse.

Indoor air pollution can cause a person to feel tired, to suffer eye pain, headache and other problems. Some pollutants(污染物) can cause breathing disorders, diseases of blood and even cancer. Most scientists agree that every modern house has some kind of indoor pollution.

People have paid more attention to the problem now. It is true that when builders began making houses and offices they did not waste energy. To do this they build buildings that limited the flow of air between inside and outside. They also began using man-made building materials. These materials are now known to let out harmful gases.

As the problem became more serious, scientists began searching for a way to deal with it. They discovered a natural pollution control system for building--green plants. Scientists do not really know how plants control air pollution. They believe that a plant’s leaves absorb or take in the pollutants. In exchange the plant lets out oxygen through its leaves and tiny organizations on its roots. Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square meters of space. Studies of different plants show that each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants. Having green plants inside your house can make it a prettier and more healthy place.

1.Generally speaking, indoor air pollution may be more harmful than the air outside because________.

A. indoor air pollution can often make people seriously ill

B. there may be more harmful gases outside the buildings

C. the air indoors is polluted, which is very harmful

D. man-made building materials give off dangerous gases

2.Some kind of indoor pollution can be found in _______.

A. every modern house B. every old house

C. all kinds of houses D. all kinds of offices

3.The indoor air pollution is caused by ______.

A. the building way that the builders want to save energy

B. the man-made building materials and the limit of air-flow

C. the building things that are made of man-made materials

D. the limit of the flow of air between inside and outside

4.The reason why we should use different kinds of plants to clean the air is that ______.

A. plants can let out all kinds of pollutants indoors

B. plants may take in more oxygen which people need

C. plants can absorb all kinds of harmful indoor chemicals

D. plants can make our houses prettier and more healthy

 

Answer 1

1.D

2.A

3.B

4.C

【解析】

試題分析：文章關(guān)注的是室內(nèi)空氣污染問(wèn)題。一些科學(xué)家認(rèn)為，室內(nèi)空氣污染要比室外的空氣污染更嚴(yán)重。室內(nèi)空氣污染會(huì)導(dǎo)致呼吸障礙、血液方面的疾病，甚至有致癌的危險(xiǎn)。

1.They also began using man-made building materials. These materials are now known to let out harmful gases.”可知，室內(nèi)空氣污染比室外的空氣污染更嚴(yán)重，這是因?yàn)槿斯そㄖ�材料�?huì)釋放很多的有害氣體，故選D。

2.Most scientists agree that every modern house has some kind of indoor pollution.”可知，現(xiàn)代的每一間房屋都存在室內(nèi)污染的問(wèn)題，故選A。

3.buildings that limited the flow of air between inside and outside. They also began using man-made building materials. These materials are now known to let out harmful gases.”可知，造成室內(nèi)污染的原因是空氣無(wú)法流通，建筑使用的人工建筑材料釋放有害氣體，故選B。

4.each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants.”可知，不同的植物吸收不同的有害化學(xué)物質(zhì)，因此，應(yīng)該在室內(nèi)種植不同的綠色植物，故選C。

考點(diǎn)：健康類短文閱讀