Question

听下面一段独白，回答以下小题。

1.How many people are damaging their hearing by listening to loud music?

A.1.1 billion B.2 billion C.3 billion

2.How long should people listen to music?

A.More than 2 hours a day

B.Less than one hour a day

C.About 3 hours a day

3.How do loud sounds damage your hearing?

A.By listening to them unsafely.

B.By confusing your hearing system.

C.By killing off little hair cells in the inner ear.

4.What’s the characteristic of the cells?

A.They don’t grow back

B.They can grow back soon.

C.They can never be destroyed.

Answer

1.A

2.B

3.C

4.A

【解析】

【原文】

M: The World Health Organization is worried that 1.1 billion teenagers and people in their twenties and early thirties are damaging their hearing by listening to loud music. It says nearly half the young people risk hearing loss because of the “unsafe use” of personal music players, including smart phones. Loud music in nightclubs, bars and at sports events also increase the risk. The WHO recommends a safe limit of listening to music for just one hour a day. The WHO director for injury prevention, Dr. Etienne Krug, told the BBC that hearing loss is easily preventable. Dr. Krug said keeping the volume down and limiting the use of personal audio devices to less than one hour a day would save a lot of people’s hearing. However, he also said, “Even an hour can be too much if the volume is too loud.” Ralph Holme, a researcher, explained how loud music can damage ears. He said: “Loud sounds damage your hearing by killing off thousands of little hair cells in the inner ear. The cells are very fragile and they get damaged and die due to loud sounds for too long.” He warned: “The problem is that they don’t grow back and the ear can no longer hear sounds.”