9.We all have an idea about the common types of environmental problems.However,light pollution may be a new term to many of us.But,the fact is,it does affect mankind,other living forms and the environment as a whole.
What is light pollution?It presents all forms of misused man-made light.The obvious cause of light pollution is the use of outdoor lighting products improperly.It can be office lighting,car headlights,station lights,streetlights and many more.
Light pollution is harmful to both animals and plants.Upon studies,it is found that obvious effects  are observed in the behaviour of nocturnal animals.Needless to mention,bright light at night makes it difficult for these animals to hunt,wander and perform their regular activities.Light pollution is directly or indirectly responsible for causing several diseases.Its effects are related to disturbance in the physical rhythm.It contributes to risks of developing cancerous cells.So,it's nothing less than a threat to human health.
You have already seen the negative effects of light pollution on animals and human health.Apart from this,the actual cost of misused light is about millions of dollars every year.It also leads to the release of greenhouse gases and global warming.After all,fuels are used for producing electricity.
While outdoor lighting and using man-made lighting products are part of our modern lifestyle,some simple ways will surely help in reducing light pollution.For example,while installing outdoor lighting,make sure that they are pointed downwards.Also,use only the required lighting equipment for both home and offices.Believe it or not,many people living in the urban areas cannot view clear sky and stars at night.Let's contribute our part in reducing the pollution.

32.What can we learn about light pollution?A
A.It is a negative fruit of light technology.
B.It has no effect on plants
C.It contributes to most cancers.
D.It affects animals'normal activities in the daytime.
33.How does light pollution affect the climate?D
A.It reduces temperatures by days and makes nights warmer.
B.It creates more clouds over parts of the Earth.
C.It stops the release of greenhouse gases.
D.It causes global temperatures to go up.
34.How can we contribute our part in reducing light pollution?B
A.Forbid the use of outdoor lighting.
B.Don't use unnecessary lights at home and offices.
C.Reduce money spent on man-made light in urban areas.
D.Use clean energy to produce electricity.
35.It can be inferred from the last paragragh thatC.
A.Citizens should be forbidden to install outdoor lighting.
B.Only simple ways can help reduce light pollution.
C.Light pollution needs to be dealt with urgently.
D.There is no clear sky or stars over the urban areas.

分析 本文是科普說(shuō)明文.主要介紹了光污染的定義、造成的危害及防治建議等.

解答 ADBC
32.A 根據(jù)第二段可知,光污染是濫用各種人造光源而形成的,即不恰當(dāng)?shù)厥褂脩?hù)外照明產(chǎn)品,可以是辦公照明、汽車(chē)車(chē)燈、方位燈、路燈等.由此推斷,光污染可以說(shuō)是光技術(shù)的壞影響.
33.D 由第四段"It also leads to the release of greenhouse gases and global warming."可知,光污染會(huì)造成更多溫室氣體的排放,從而引起全球變暖,D項(xiàng)符合文意.C項(xiàng)與文意相悖,A、B項(xiàng)無(wú)依據(jù).
34.B 根據(jù)最后一段"Also,use only the required lighting equipment for both home and offices."
可知,在家里和辦公室里只用必需的照明產(chǎn)品便可減少光污染,應(yīng)選B項(xiàng).
35.C 由文章最后兩句,尤其是"Beleve it or not,many people living in the urban areas cannot view clear sky and stars at night"可知,光污染非常嚴(yán)重,據(jù)此推知光污染問(wèn)題有待解決,應(yīng)選C項(xiàng),其他選項(xiàng)均與文章不符.

點(diǎn)評(píng) 做閱讀時(shí)經(jīng)常犯錯(cuò)的主要原因是,僅憑讀過(guò)文章后殘留在腦海中的一絲印象來(lái)勾選答案,這樣便很容易掉入出題人故意設(shè)布下的題目陷阱.所謂閱讀理解,對(duì)于題目的理解一定要忠實(shí)于原文,因此,每一道題都應(yīng)該與原文作全面的對(duì)比與核查,再得出答案.也就是說(shuō),閱讀理解的每一道題目,在原文都應(yīng)該有明確的出處,我們把這一出處叫做原文相關(guān)句,(1)排除與原文相關(guān)句主題不一致的選項(xiàng)(2)排除與原文相關(guān)句態(tài)度相反的選項(xiàng)  (3)排除用于過(guò)于極端或負(fù)面的選項(xiàng)(4)注意結(jié)合文章主旨和主題去排除.

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