Researchers think that some teenagers do not realize that they are listening to music at very loud levels.Researchers suggest parents stand next to their children while they are wearing earphones.If the parents can hear the music,the sound is too loud.Teenagers should set the volume control on their music players to somewhere between onehalf and twothirds the highest level,never louder.
Even a small hearing loss can affect a child’s social development.Communication skills and grades in school can also suffer.Doctor Eavey says,“What we’re seeing is a big jump in the prevalence(患病率)of hearing loss in a very short time,in less than one generation.”
【解题导语】 研究发现,美国的很多青少年听力出现了问题。
36.What is the main idea of this passage?
A.Modern technology harms people’s health.
B.Many American teenagers have some hearing loss.
C.American teenagers are suffering from ear diseases.
D.American parents notice the harm of listening to music.
解析:选B。主旨大意题。通读全文,可知文章主要是讲美国的很多青少年听力有所下降,故选B。
37.What do we learn from Paragraph 3?
A.The exact cause of hearing loss in American teenagers is still unknown.
B.Teenagers’hearing loss is mainly caused by listening to music on MP3 players.
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