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【题目】Many of the exhibits were damaged in the fire and _______ were totally destroyed.

A. all B. both C. much D. some

【答案】D

【解析】

试题分析:A全部,所有;B两者都;C 一些,指代不可数名词;D一些,指代可数名词或不可数名词。exhibits 是可数名词,排除C;此处是说,很多展品在大火中遭到损坏,一部分被完全毁坏了。all 和both 均与语境不符,故选D。

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Hearing loss, that’s an older person’s problem, right? Think again. Noise, not age, is the leading cause of hearing loss. While hearing problems are common among older folks, damage from everyday noise is growing among younger Americans, including those in their teens and 20s.

The latest research from the Centers for Disease Control and Prevention (CDCP) shows some 40 million Americans ages 20 to 69 suffering hearing damage from everyday loud noise, including heavy traffic, noisy restaurants, rock concerts, sporting events and loud music via earbuds(耳塞). Among 12- to 19-year-olds, researchers estimate some 17 percent show evidence of noise-induced hearing loss in one or

both ears. Worse, many Americans don’t even realize their hearing has been affected.

In the CDCP’s analysis of more than 3,500 hearing tests, one out of four adults claimed their hearing was just fine and reported no job-related noise, yet hearing tests indicated they already had noise-induced hearing loss. This type of damage causes a alarming drop in the ability to hear high-pitched sounds, and it was evident in those as young as 20.

“We have government standards in the workplace to protect workers from noise, but nothing protects you from a society getting noisier every year,” says audiologist Jack Scott, of the Center for Audiology, Speech, Language, and Learning at Northwestern University. Even in protected parks and wildlife areas, a recent study found that noise pollution from traffic, logging and drilling has doubled, drowning out the natural sounds of birds and rushing water.

Sarah Sydlowski, the audiology director of the hearing implant program at the Cleveland Clinic, puts the problem this way: “The baby boomer generation is dealing with skin cancer from the tanning they did as teens. This generation will have to deal with the consequences of noise exposure that damaged their hearing.” Many young adults don’t realize that hearing loss is permanent. When loud noise kills the sensitive inner-ear cells that allow us to hear, they don’t regenerate. “The hearing you have when you’re

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积的),” adds Scott. The more often the ears are exposed to damaging noise, the more cells die, leading to damaged hearing day by day.

Part of the reason hearing damage is showing up earlier is today’s improved portable devices. The sound level 28 years ago from the Walkman, with its weak headphones, was much lower than today’s high-fidelity smartphones with earbuds that deliver louder sound much closer to the eardrum. A study that compared hearing tests of teens found the levels of mild hearing loss jumped 30 percent. But don’t just blame the earbuds, says Sydlowski. People underestimate what a safe level of sound is, “especially when they’re already in a noisy environment.” Both she and Scott say a common problem among their younger patients is turning up the sound in their earbuds to mask the noise around them.

To protect your hearing, follow these tips:

Turn down the volume. If you’re listening to music through your earbuds, “any volume level higher than 50 percent is risky,” says Sydlowki.

Limit your exposure. Do not attend fitness classes with deafening music (or at least move away from the speakers, advises Sydlowski) and sports stadiums with ear-splitting crowd noise.

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