Ifyoucan’tmanagetoquitsmokingtoimproveyourownhealth,doi...

問題詳情：

If you can’t manage to quit smoking to improve your own health, do it for your kids’ hearing. Teenagers who have been exposed to secondhand smoke have about double the risk of hearing loss of those who had little or no exposure, say researchers from the New York University School of Medicine.

They tested more than 1,500 adolescents (青少年) aged 12 to 19 for blood levels of cotinine, a byproduct of nicotine that forms when people are exposed to cigarette smoke, and then tested their ability to hear high- , medium-, and low-frequency sounds.

The more smoke the teens had been exposed to, the greater their risk of hearing loss. Those with the highest levels of exposure had nearly three times the risk of hearing loss.

Hearing loss was especially marked in the mid- to high-frequency range, which means the adolescents may have difficulty understanding human speech. That could cause problems in school, where kids may be labeled trouble makers.

Surprisingly, some 80 percent of these kids had no idea that they had hearing loss.

More than half of American children and teenagers are exposed to secondhand smoke in their homes. This exposure increases children’s risk of lung cancer, learning disabilities, heart disease, and other diseases.

Scientists suggest that parents minimize their children’s exposure to tobacco smoke and that all children and teenagers exposed to secondhand smoke should be regularly tested for hearing loss, in case hearing aids are needed.

28. According to the passage, teenagers exposed to secondhand smoke may     .

A. lose weight                B. become short-sighted

C. lose heart                  D. not hear people well

purpose of this article is to        .

   A. warn parents against smoking in the face of their children.

   B. discourage teenagers from smoking.

   C. persuade teenagers to stay away from smokers.

   D. encourage teenagers to have regular medical examinations.

’s a surprising fact that        .

   A. teenagers exposed to secondhand smoke have trouble at school.

   B. the majority of the teenagers who suffer from hearing loss are not aware of the problem

   C. more than half of American are exposed to secondhand smoke at homes

   D. exposure to secondhand smoke can cause a number of problems except hearing loss.

h of the following two things are suggested by scientists according to the passage?

   a. Parents should try to smoke as little as possible.

   b. Children should take medicine regularly to prevent hearing loss.

   c. Children and teenagers exposed to secondhand smoking should be checked regularly.

   d. Parents should talk with the teachers about their children’s performance at school.

    A. a and b        B. a and c        C. b and d     D. c and d

【回答】

DABB

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