题目内容
4.Most children,even the youngest children,are delighted to be around cats and dogs.But these pets carry plenty of germs and allergens (过敏原),prompting researchers to ask:Are cats and dogs really safe for children?A study finds that,contrary to many parents'fears,owning cats or dogs does not increase a child's risk of developing allergies,and in fact,may actually protect them.The study's leading author,Dr-Dennis Own by of the Medical College of Georgia,said that even he was"very surprised"by the results.He and his colleagues followed more than 470 children from birth to age 6 or 7,comparing those exposed to cats and dogs during their first year of life to those who were not.
By using skin prick (皮肤针刺) tests for detecting common allergies,the researchers found that,contrary to what many doctors had been taught for years,children who had lived with a pet were not at greater risk.
Even more remarkable,children who had two or more dogs or cats had even great reduction,up to 77%,in risk of allergies.Researchers suggest this protective effect may be the result of early exposure to lots of bacteria that are carried by dogs and cats.Exposing young children to these bacteria helps"exercise"their immune systems early in life so that they're better able to resist allergic diseases later.
And while researchers are not encouraging parents to buy dogs or cats just to reduce a child's allergy risk,they say if a family already has one or more animals,there's no need to get rid of them.
28.Why do the researchers feel"very surprised"by the results of the study?C
A.Because parents are so much worried about their children.
B.Because so many children are playing with cats and dogs.
C.Because the results are contrary to their expectation.
D.Because children with animals may develop allergies easily.
29.Compared with children who have pets,those who haven'tB.
A.will lose the chance to develop immune system
B.may suffer allergic diseases more often
C.will reduce the harm from bacteria
D.can keep doctors away
30.It can be inferred from the passage thatA.
A.the results of the study can make families with pets feel at ease
B.fewer families would like to own cats and dogs
C.keeping pets is a good way to keep children healthy
D.pets are ill-treated by their owners
31.What may be the best title of the passage?B
A.How to protect your kids from allergies.
B.Your pets may be helping your kids.
C.Bacteria do good to your kids.
D.Advantages of owning pets.
分析 本文是一篇科教类阅读,属于说明文,主要讲述了现代科学证明:孩子在幼儿时期接触狗或猫等宠物对孩子没有害处,反而增强孩子抗感染的能力,增强孩子的安全感.
解答 28.C 细节理解题.根据该段的最后一句话判断.因为实验研究的结果与人们原来的观点相斥,故教授吃惊.故C正确.29.B 细节理解题.根据第四段第一句话Even moreremarkable,children who had two or more dogs or cats had an even greaterreduction,up to 77 percent,in risk of allergies.可知,与有宠物的孩子相比,那些没有的可能遭受过敏疾病更多.故B正确.
30.A 推理判断题.根据文章的最后一段进行推断And whileresearchers are not encouraging parents to buy dogs or cats just to reduce achild's allergy risk,they say if a family already has one or more animals,there's no need to get rid of them.可知,这项研究的结果可以使有宠物的家庭感到放松.故A正确.
31.B 主旨大意题.根据文章内容可知,本文主要讲述了现代科学证明:孩子在幼儿时期接触狗或猫等宠物对孩子没有害处,反而增强孩子抗感染的能力,增强孩子的安全感.故选B.
点评 本文是一篇科教类阅读,题目涉及多道细节理解题,推理判断题,主旨大意题.做题时学生应仔细阅读原文,把握文章主要内容,联系文章上下文内容并结合所给选项含义,从中选出正确答案,一定要做到有理有据,切忌胡乱猜测.
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