The high noi of modern life may affect speech and language development in the

题文

The high noi of modern life may affect speech and language development in the very young, according to a study that found the auditory (听觉的) parts of the brains of young mice are slower to organize properly in the prence of continuous sounds.Rearchers at the University of California, San Francisco, reared a group of rats in an environment of continuous background noi and found that their brain circuits that receive and interpret (解释) sound did not develop at the same rate as animals that were raid in a quieter environment.Edward F. Chang and Michael Merzenich, co-authors of the study appearing in the journal Science, said that the continuous noi delayed the organization of auditory neurons (神经细胞) during a critical two-to-three-week period after the rat pups were born.For rats not expod to the noi, the auditory cortex(皮层) neurons during this period gathered into a smaller area and began developing a lective respon to sounds.But for the noiexpod rats, this organization was slowed, causing a delay in the development of the ability to discriminate(辨别) specific sound tones. The rearchers said it took three or four times longer for the rats raid in a noisy environment to reach the basic bench marks (基准) of auditory development en in the rat pups not expod to nois.Although the rat is not a perfect model for what happens in humans, the authors note, the study does suggest that high levels of noi might possibly affect some language learning in babies.“The findings suggest that environmental noi, which is commonly prent in contemporary child-rearing environments, can potentially contribute to auditory and language-related development delays,”the authors wrote in Science.The authors noted that although the brain development was delayed in rats expod to the noi, their brains did eventually mature (成熟的) normally.小题1:The scientists at California University studied rats_______.A．of different age groupsB．with different habitsC．in different environmentsD．from different areas小题2:The rats expod to noi, compared to tho not expod, _______.A．were more nsitiveB．were dullerC．grew up more slowlyD．gathered together more quickly小题3: The result of the rearch mainly tells us that noi _______.A．delays brain developmentB．stops baby growthC．affects speech and languageD．destroys brains小题4: The findings of the rearch are said to have special connections with _______.A．caus of noisB．medical scienceC．other living thingsD．human babies 题型：未知难度：其他题型

答案

小题1:C小题2:B小题3:A小题4:D

解析

小题1:从文章第二段内容可知,加利福尼亚大学的研究者们养了一些老鼠,进行实验。分别在不断的噪音和相对较安静的环境下进行实验。小题2:从文章第五段可以得出the rats expod to noi要比the rats not expod to noi反应迟钝。小题3:从最后—段内容可以得知,噪音延缓脑的发育。B项是明显错误的。不是毁坏脑子,而是延缓,可知D项是错误的。此题侧重的是对老鼠的实验结果,而C项是对这个结果的进—步推测,所以C是不对的。小题4: 文中指出“the study does suggest that high levels of noi might possibly affect some language learning...babies.”由此可以得知,这个科研结果与婴儿有关。

考点

据考高分专家说，试题“The high noi of mo.....”主要考查你对 [健康环保类阅读 ]考点的理解。 健康环保类阅读

健康环保累阅读概念：

健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。体裁有记叙文、 说明文、议论文和各种应用文。

健康环保类文章阅读技巧：

   健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。阅读此类短文要以现象或事物为中心进行思考，理解现象产生的原因、条件和客观规律等。同时要抓住事物的特征、用途和相互关系等。科普环保类文章一般为说明文，从结构上看大致可分为三个部分：   第一部分一般是文章的首段，主要用来提出文章的主题，即文章想要阐述、说明的主要内容；   第二部分是文章的主体，可由若干个段落组成，对文章的主题进行展开说明；   第三部分是结尾段，对文章的主题进行归纳总结。这类文章多用一般现在时，而且一般多使用客观性词语表述。有时为了强调客观性，也常使用被动语态。   从近几年的考试题来看，科普环保类的文章越来越与人们的实际生活相接近。由于此类文章缺乏故事情节，很多同学对此类文章感到费解。但一般的科普类文章都是就事论事，需要逻辑推理和想象的时候较少，因此此类阅读题也没有同学们想象中的那么难，只要多加训练，就能较好地答题。【阅读策略】 1、概要(Summarizing)：  阅完材料后，将所阅材料浓缩，摘要，做出所阅材料的书面或口头梗概。 2、组织(Organization)：  阅读后根据阅读内容，识别观点、人物、事件之间的关系以及文章的结构关系。如：时间关系、比较或对比关系、相关关系及因果关系等。