問題詳情：
Stop and listen! What do you hear? You may hear many different sounds. Some of those sounds may be noise. Noise is a loud or unwanted sound.
Many kinds of machines, such as motorcycles, jet planes (噴氣式飛機), farm tractors can cause noise, and power motors can cause noise. And, to some people, rock music is also a noise.
What happens to people who live near noisy machines or use them over a period of time? Doctors have found that these people have trouble in sleeping. And most importantly, constant (連續的) loud noise can cause loss of hearing.
Scientists use a unit of measure called a decibel(分貝) to measure the loudness of a sound. The sound of a quiet room, for example, measures 35 decibels. Talking measures between 40 and 65 decibels. Sounds from traffic and from some rock bands measure over 120 decibels. Noise at such high level causes the greatest hearing loss.
根據短文內容，判斷正(T)誤(F)。
( )rding to the passage, noise is all sounds that you can hear.
( )2.A “decibel” is a machine that makes loud noise.
( ) noise can help people sleep better.
( ) all people think that rock music is a noise.
( ) can infer (推斷) from the passage that noise is a serious problem.
【回答】
1—5F F F T T
知識點：日常生活類
題型：閲讀理解
國文精選館
