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    In today’s world, almost everyone knows that air pollution and water pollution are harmful to people’s health. However, not all know that noise is also a kind of pollution, and that is harmful to human, too.
    People who work and live under noisy conditions usually become deaf(耳聋的). Today, however, scientists believe that 10% of workers in Britain are deafened by the noise where they work. Many of the workers who print newspapers and books, and who weave cloth become deaf. Quite a few people living near airports also become deaf. Recently it was discovered that many teenagers in America could hear no better than 65-year-old people, for these young people like to listen to “pop” music and most of “pop” music is a kind of noise. Besides, noise produced by jet plane or machines will make people’s life difficult and unpleasant, or even make people ill or even drive them mad. It is said that a continuous noise of over 85 decibels（分贝） can cause deafness.
    Nowadays the governments in many countries have made laws to reduce or control noise and make it less than 85 decibels. In China, the people’s government is trying to solve not only air and water pollution problems but also the noise pollution problems.
    小题1:In the world today, not every person knows        .
    A．water pollutionB．air pollutionC．harmful pollution D．noise pollution
    小题2:Today scientists believe that       .
    A．90% of all the workers in Britain are not suffering from noise
    B．10% of all the workers in Britain are working in noisy places
    C．10% of all the workers in Britain are deafened by the noise where they work.
    D．90% of all the workers are free from any noise
    小题3:Those who       usually have poorer hearing.
    A．weave clothB．sell newspapers
    C．like listening to musicD．often travel by plane
    小题4:According to the passage, a continuous noise       can make you deaf.
    A．in working places B．of less then 85 decibels
    C．of over 85 decibelsD．of only 85 decibels

    小题1:D
    小题2:C
    小题3:A
    小题4:C

    试题分析：本文是一篇说明文，说明了在今天的世界上，几乎每个人都知道空气污染和是污染对人们身体有害，然而，并不是所有人都知道噪声污染也对身体有害，声音超过85分贝，可以导致耳聋，所以在每个国家制定法律减少或控制噪音使它小于85分贝
    小题1:细节题。由第一段最后一句However, not all know that noise is also a kind of pollution, and that is harmful to human, too可以知道答案，故选D。
    小题2:细节题。由第二段第二行however, scientists believe that 10% of workers in Britain are deafened by the noise where they work.可以知道答案，故选C。
    小题3:细节题。由第二段第三行Many of the workers who print newspapers and books, and who weave cloth become deaf.可以知道答案，故选A。
    小题4:推理题。由第二段最后一句It is said that a continuous noise of over 85 decibels（分贝） can cause deafness.可以知道答案，故选C。
    点评：本文采用总-分-总的结构，第一段是全文的主旨，最后总结全文，阅读此短文，首先注意第一段和最后一段，说明文、议论文类文章：文章的主题句往往出现在首段或末段。第一段给出作者的观点或引出将要介绍的事物，而末段则总结全文、重申论点。因此，在阅读议论文或说明文时，一定要注意首段或末段的信息，因为那通常就是文章的主题句
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