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12.Age plays a major part in people who are infected with cold,ie,in people who suffer from cold infection.A study done by University of Michigan,has shown information that seems to be true for the general population.Babies are the most cold infected group,generally more than six colds in their first year.Boys have more colds than girls up to the age of three.After three,girls are easier to get infected with cold than boys,and teenage girls get three colds a year to boys'two.The general cold infections continue to get less into adults.Elderly people who are in good health have as few as one or two colds every year.One interesting thing is found among people in their twenties,especially women,who show a rise in cold infection,because people in this age group are most likely to have young children.
The study has also found that economy plays an important role as well.With more and more income,the frequency at which colds are reported in the family is getting lower and lower.Families with the lowest income usually suffer about a third ally forces people to live in rooms more crowded than rooms owned by richer people,and the crowding usually leads to more chances for the cold virus to travel from person to person.Low income may also have an effect on our diet.Many scientists believe that a poorer diet usually leads into more possibilities of cold infection.

34.Which of the age groups has the highest frequency of cold infection?A
A.Small babies.
B.Teenage boys.
C.Adult women.
D.Elderly people.
35.The purpose of writing this passage is toB.
A.give the readers some tips to avoid cold infection
B.show a carefulmade study on cold infection
C.report the major reasons leading to cold infection
D.describe all the possible dangers of cold infection
36.How does economy play an important role in cold infection?D
A.Families with lower income suffer less from cold infection.
B.People who have lower income enjoy living in crowded rooms.
C.Rich families can have better nutrition and never get infected.
D.People with higher income have fewer chances of infection.
37.From the passage we can infer thatD.
A.age is the only important factor that connects with colds
B.families with the highest income will more easily get infected
C.people have lower frequency of infection as they grow older
D.a better diet may help people to fight against cold infection.

分析 本文属于说明文阅读,作者通过这篇文章主要向我们描述了最新的一项调查.感冒与年龄和收入多寡密切相关.

解答 34.A.细节理解题.由第一段第三句话"Babies are the most cold infected group,generally more than six colds in their first year可知,小儿最易受感冒侵袭;故选A.
35.B.推理判断题.根据文章With more and more income,the frequency at which colds are reported in the family is getting lower and lower可知全文向我们客观介绍了一项调查结果:感冒与年龄和收入多少密切相关;故选B.
36.D.细节理解题.由第二段第二句话With more and more income,the frequency at which colds are reported in the family is getting lower and lower可知收入较低的人喜欢住在拥挤的房间里;故选D.
37.D.推理判断题.由第二段最后一句话Many scientists believe that a poorer diet usually leads into more possibilities of cold infection可知,良好的饮食有助于战胜感冒的侵袭;故选D.

点评 考察学生的细节理解和推理判断能力,做细节理解题时一定要找到文章中的原句,和题干进行比较,再做出正确的选择.在做推理判断题不要以个人的主观想象代替文章的事实,要根据文章事实进行合乎逻辑的推理判断.

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