17.A new international study shows that some people's biological clock plays a powerful role for their life expectancy,regardless of lifestyle choices.
    Published in the latest issue of Aging on Wednesday,the study has found the most definitive evidence to explain why some people keep healthy lifestyle but die younger than others.
    Geneticist Steve Horvath from the University of California,Los Angeles (UCLA),led a team of 65scientists around the world to record age-related changes to human DNA,analyse blood samples collected from 13,000 people and estimate their lifespan.
    A higher biological age,regardless of actual age,consistently predicts an earlier death,the study says.
"You get people who are vegan,sleep 10hours a day,have a low-stress job,and still end up dying young,"Horvath said in a statement."We have shown some people have a faster innate aging rate."
    The findings discovered that 5 percent of the population ages at a faster biological rate,which translated to a roughly 50 percent higher than average risk of death at any age.
"The great hope is that we find anti-aging interventions that would slow your innate aging rate,"Horvath said,adding that"this is an important milestone to realizing this dream."

24.Some people keep healthy lifestyle but die younger than others becauseD.
A.their biological clock is not powerful enough
B.the most definitive evidence has been found
C.they have a higher actual age than others
D.they ages at a relatively faster biological rate
25.How was the study conducted?A
A.By collecting and analyzing data
B.By interviewing lots of people
C.By researching previous studies
D.By studying different lifestyles
26.According to the study,it can be inferred thatC.
A.people who keep healthy lifestyle tend to live longer
B.people's lifespan can be predicted by their age
C.5percent of people are believed to have a faster innate aging rate
D.a(chǎn)nti-aging interventions have proved to slow the innate aging rate
27.Which of the following would be the best title for the passage?C
A.We all should keep healthy lifestyle
B.Geneticist finds anti-aging interventions
C. Biological clock predicts life expectancy
D.Horvath builds an important milestone.

分析 第一段主要講生物鐘在人的壽命預(yù)測中起著重要作用.第二到四段主要講那些保持良好生活習(xí)慣的人早逝主要因?yàn)樗麄兿忍炖匣俾矢哂谄渌耍谖宥沃饕v科學(xué)家們發(fā)現(xiàn)了通過干涉來抗衰老的辦法.綜上所述,本文主要圍繞了生物鐘能預(yù)測壽命來展開.

解答 24.D 細(xì)節(jié)題.由第四段最后一句 We have shown some people have a faster innate aging rate 可知,生活習(xí)慣良好的人卻早逝是因?yàn)樗麄兿忍斓睦匣欤瓺項(xiàng)意為"他們的老化速度相對(duì)更快",符合題意.故正確答案為D.
25.A細(xì)節(jié)題.由第三段 …record age-related changes to human DNA,analyse blood samples collected from 13,000 people and estimate their lifespan 可知,研究通過記錄與年齡相關(guān)的 DNA 的變化,和分析血液樣本來預(yù)估實(shí)驗(yàn)者的壽命.A項(xiàng)意為"通過收集和分析數(shù)據(jù)",符合題意.故正確答案為A.
26.C推斷題.由最后一段第一句 The findings discovered that 5 percent of the population ages at a faster biological rate 可知,5%的人有更快的老化速率.C項(xiàng)正確.A項(xiàng),由第二段 …why some people keep healthy lifestyle but die younger than others 可知,人們就算保持健康的生活方式也有可能英年早逝.A項(xiàng)錯(cuò)誤.B項(xiàng),由第四段第一句 A higher biological age,regardless of actu
l age,consistently predicts an earlier death 可知,預(yù)測人的壽命并不能通過實(shí)際年齡.B項(xiàng)錯(cuò)誤.D項(xiàng),由最后一段第二句 The great hope is that we find anti-aging interventions that would slow your innate aging rate 可知,抗衰老的干預(yù)措施只是有可能減緩先天衰老速率,還沒有被證實(shí)一定會(huì).D項(xiàng)錯(cuò)誤.故正確答案為C.
27.C主旨題.第一段主要講生物鐘在人的壽命預(yù)測中起著重要作用.第二到四段主要講那些保持良好生活習(xí)慣的人早逝主要因?yàn)樗麄兿忍炖匣俾矢哂谄渌耍谖宥沃饕v科學(xué)家們發(fā)現(xiàn)了通過干涉來抗衰老的辦法.綜上所述,本文主要圍繞了生物鐘能預(yù)測壽命來展開.C項(xiàng)意為"生物鐘預(yù)測壽命",符合文意.故正確答案為C.

點(diǎn)評(píng) 本文是一個(gè)科教類閱讀理解,題目涉及多道細(xì)節(jié)理解題,做題時(shí)結(jié)合原文和題目有針對(duì)性的找出相關(guān)語句進(jìn)行仔細(xì)分析,結(jié)合選項(xiàng)選出正確答案.推理判斷題也是要在抓住關(guān)鍵句子的基礎(chǔ)上合理的分析才能得出正確答案,切忌胡亂猜測,一定要做到有理有據(jù).

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