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  3. The steady hum of school heating systems and air-conditioners can mean lower

The steady hum of school heating systems and air-conditioners can mean lower

游客2023-11-07  45
问题     The steady hum of school heating systems and air-conditioners can mean lower test scores for many young students, found a new study. The finding adds to growing evidence that classroom noises【C1】______ with learning.
    Plenty of studies have demonstrated the distracting【C2】______of noise in the classroom. In louder rooms, kids have more trouble hearing the teacher and become easily distracted,【C3】______when they are reading to themselves. Schools【C4】______ airports also report lower test scores than schools that are not affected by airplane noise. In one study, German students started scoring better on reading and vocabulary tests after a nearby airport【C5】______.
    Researchers were also interested in less【C6】______ sounds like the general buzz of basic mechanical systems. It was【C7】______that kids who spent all day in classrooms with such noises【C8】______ to score lower on standard reading comprehension tests. But math scores didn’t【C9】______ with noise levels, possibly because teachers use more【C10】______ when they’re teaching math than when they’re teaching words.
  【C11】______, lots of background noise sets kids up for problems. Studies have shown that kids make more noise in louder rooms.【C12】______by the scraping of chairs, the hum of the heating system,【C13】______the voices of other kids competing to be heard, some students【C14】______have a particularly hard time hearing【C15】______ the teacher is saying. And it’s not that they’re lazy or using noise as an【C16】______. Young brains have a much harder time【C17】______a signal from the background than mature, adult brains do.
    Along with【C18】______work, the new findings suggest the【C19】______ for enforcement of ANSI’s standards. Despite an endless list of budgetary【C20】______, schools might have to put quiet at the top of their to-do lists. [br] 【C6】
选项 A、obvious
B、startling
C、agreeable
D、constant
答案 A
解析 形容词辨析题。句意为：研究人员对基本机械系统的一般轰鸣声这类不明显的声音也很感兴趣。本空格所需填的形容词用于说明普通的机械系统与机场噪音相比的特点，obvious“明显的”放在less后面符合文意要求。此处所说的声音也是噪音，不可能悦耳，故排除agreeable；文章中并没有说到声音是否是“令人吃惊的”，排除startling；两类声音都可能是持续不断的，constant“持续的”不能说明两者区别，也排除。
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