题目内容
根据材料请回答 36～40
Pollution around the House
Scientists are closely concerned with the structure of buildings and with the quality of building materials.The World Health Organization (WHO) observes that the introduction of air conditioning and energy conservation measures have been accompanied by growing problems of indoor air quality.Some pollutants(污染物)arise from insulation(绝缘)products, some from moving cars, and others from modern housing materials.As many Europeans spend up to 900% of their lives in buildings, the health effects of the indoor climate are very important.
Some construction materials, including fiberboard, insulation foams and certain glues(for man-made wood floor boards, for example), gives out organic products such as form-aldehyde(甲醛).Heat and humidity increase the release of formaldehyde and the gas seri-ously harms the eyes.Paint, lacquer(抛光漆), etc.can also release dangerous gas into in-door air.
Construction materials can cause serious damage, especially when they contain asbes-tos(石棉).Asbestos is naturally present in rock formations worldwide.It consists of mi-neral substances composed of solid, non-combustible (不易燃的 ) fibers.These properties make asbestos a highly sought-after(受欢迎的) construction material.As early as 1931,however, public health officers in the United Kingdom revealed the connection between breathing in asbestos dust and such diseases as lung cancer.
The land on which a building is sited may also contribute to pollution.Some kinds of granite(花岗岩)or similar rocks contain traces of radium.As it breaks down, this natural-ly radioactive element produce some kind of radioactive gas that goes through tiny cracks in walls, floors and building materials, and makes its way into the building and the rooms.The better the homes are insulated, the more is the dangerous gas in indoor air.The main effect of this dangerous gas on health is to increase the risk of lung cancer.
第 36 题 What is the main idea of the passage？
查看答案
搜索结果不匹配？点我反馈
更多问题
A．goodB．wellC．regularlyD．stable
The remaining lions witI die out within decades.
A．doesB．hasC．doingD．would
根据材料请回答 51～65
Television
Television is the greatest communication medium ever designed and operated by man.It sends into the human brain an 51 amount of opinions and information and 52 moral and artistic standards for all of us.Every minute of a television program teaches us some-thing.It is never a neutral influence.For example, how and when public issues are 53 depends in large part 54 how they are treated by the television networks in entertainment 55 news and public affair programs.
What the American people think about government and politics in general, as well as a favorite candidate in 56 , is largely influenced by television.
Unfortunately commercial television seldom 57 anything of value to our lives.Many Americans express a deep hostility 58 television because they know most TV programs are 59 poor quality and that sometimes these programs are even 60 .
The question is: how can television be improved？ There are many things the ordinary 61 can do.For example, he can complain to his local TV stations to improve their pro-grams.He can 62 citizens' groups to urge local TV stations to improve their programs.63 , these groups should propose regular analyses of specific TV commercials and pro-grams by educators, doctors, etc, to 64 the influence of these programs on children and adults.Television can be our most exciting medium if we just think about 65 to improve it.
第 51 题
微信支付 
支付宝支付