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  3. 共用题干 AgingThroughout history man has had to accept the fact that all living ...

共用题干 AgingThroughout history man has had to accept the fact that all living ...

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问题 共用题干
Aging

Throughout history man has had to accept the fact that all living things must die,but people now live longer than they used to.Yet all living things still show the________(51)of aging,which will eventually________(52)death.
Aging is not a disease,but as a person passes maturity,the cells of the body and the________ (53) do not function as well as they did in childhood and adolescence（青春期）.The body provides less________(54)against disease and is more likely________(55)have accident.
A number of related causes may________(56)aging. Some cells of the body have a fairly long life,but they are not reborn when they die.As a person ages,________(57)of brain cells and muscle cells decreases.The other cells are replaced by new cells.In an aging person the________(58) cells and muscle cells may not be as viable（能生存的）or as capable________ ( 59 ) growth as those of a young person.
Another________(60)in aging may be changes within the cells themselves.Some of the protein chemicals in cells are known________(61)with age and became less elastic.This is why the skin of old people wrinkles and________(62).This is also the reason old people________(63)in height. There may not be other more important chemical changes in the cells.Some complex cell chemicals, such as DNA and RNA,store and________(64)information that the cells need.Aging may affect this________(65)and change the information-carry molecules so that they do not transmit the information as well.
选项 _________(51)
A:function       
B:effect
C:fact       
D:symbol
答案B
解析本句话的意思是衰老导致死亡。所以，此处应选B项。
result in：导致，例如：Their dispute resulted in war．他们的争端导致了战争。与题意相符。因此，选择D。
由上下文可知此处应填入表示“人体器官”的词，选项A、B、C项均是人体器官中的一部分，器官的总称是organs，因此，选项D为正确答案。
protect against：保护……使其免受伤害，例如：Troops have been sent to protect aid workers against attack．已经派出部队保护援助人员免遭袭击。此处缺少的是名词，所以应填入protection
be likely to have accident：更易发生意外事件。
contribute to：导致、促成，例如：Your suggestion has greatly contributed to the accomplishment of our work．你的建议大大地促进了我们工作的完成。
选项B、C表示数量的多少，不能填到此处。most：表示大多数的意思，也不符合题意。因此，选项A为正确答案。
由于前句中提到死去的人体细胞被新的细胞所代替，因此，这句话一定是阐述新细胞的，因此，选项C为正确答案。
capable of：具有能力的，属于固定搭配，例如：Susan is capable of hard work．苏珊能胜任艰苦的工作。因此，选项C为正确答案。
这一段是和上一段平行的，都是谈论导致衰老的原因，选项C与题意相符，因此，为正确答案。
略
所选词和wrinkles保持时态一致，故选A。
由上下文可以推断出本句表示老人身高变矮，因此，只能填入A项。
此句是传递信息的意思，pass on：传递，例如：Would you pass it on to the next person？把它传给下一个人好吗？
传递是一个过程，因此，本句应填入选项D。
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