Noise Pollution Stop!Listen!What do you hear? You may hear many different sounds. Some of those sounds may be noisy. Noise is loud or unwanted sound.

      Noise can be caused by many kinds of machines,such as motorcycles,jet planes,tractors (拖拉機)and so on. And,to some people,rock bands also cause noise.

      What happens to people living near noisy conditions? Doctors find that these people have trouble in sleeping. But most seriously,constant (持續(xù)的)loud noise can cause a loss of hearing.

      Scientists measure the loudness of a sound by decibel (分貝).The bigger the number of decibel is,the noisier it will be. The sound of a quiet room,for example,measures 35 decibels. Talking measures between 40 and 65 decibels. Sounds from the traffic and some rock bands can measure over 120 decibels. Noise at this high level causes the greatest hearing loss.

    根據(jù)短文內(nèi)容，完成下列任務。任務一：將畫線部分譯成漢語。

    1.       

    任務二:根據(jù)短文內(nèi)容，回答下列問題。

    2. What is noise?

    3. What can cause noise?

    4. According to the  passage,what can loud noise cause?

    任務三：根據(jù)短文內(nèi)容,選擇最佳答案。

    (   ) 5. Study the chart below.  Which room would be the quietest?

    RoomNoise   Level

    A     35 decibels

    B     120 decibels

    C     130decibels

    D      40 decibels

1.醫(yī)生發(fā)現(xiàn)這些人睡眠有困難。

2. Noise is loud or unwanted sound.

3. Noise can Ix- caused hv many kinds oi machines, such as motorcycles, jet planes, tractors and so on.

4. Loud noise can cause a loss of hearing and trouble in sleeping.

5. A

題目來源：仁愛英語同步練習冊九年級上冊下冊合訂本 > Topic1 Pollution has caused too many problrms.

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