题目内容

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.anti-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 第一段主要讲生物钟在人的寿命预测中起着重要作用.第二到四段主要讲那些保持良好生活习惯的人早逝主要因为他们先天老化速率高于其他人.第五段主要讲科学家们发现了通过干涉来抗衰老的办法.综上所述,本文主要围绕了生物钟能预测寿命来展开.

解答 24.D 细节题.由第四段最后一句 We have shown some people have a faster innate aging rate 可知,生活习惯良好的人却早逝是因为他们先天的老化更快.D项意为"他们的老化速度相对更快",符合题意.故正确答案为D.
25.A细节题.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,研究通过记录与年龄相关的 DNA 的变化,和分析血液样本来预估实验者的寿命.A项意为"通过收集和分析数据",符合题意.故正确答案为A.
26.C推断题.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项正确.A项,由第二段 …why some people keep healthy lifestyle but die younger than others 可知,人们就算保持健康的生活方式也有可能英年早逝.A项错误.B项,由第四段第一句 A higher biological age,regardless of actu
l age,consistently predicts an earlier death 可知,预测人的寿命并不能通过实际年龄.B项错误.D项,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,抗衰老的干预措施只是有可能减缓先天衰老速率,还没有被证实一定会.D项错误.故正确答案为C.
27.C主旨题.第一段主要讲生物钟在人的寿命预测中起着重要作用.第二到四段主要讲那些保持良好生活习惯的人早逝主要因为他们先天老化速率高于其他人.第五段主要讲科学家们发现了通过干涉来抗衰老的办法.综上所述,本文主要围绕了生物钟能预测寿命来展开.C项意为"生物钟预测寿命",符合文意.故正确答案为C.

点评 本文是一个科教类阅读理解,题目涉及多道细节理解题,做题时结合原文和题目有针对性的找出相关语句进行仔细分析,结合选项选出正确答案.推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案,切忌胡乱猜测,一定要做到有理有据.

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2.A warm drink of milk before bed has long been the best choice for those wanting a good night's sleep.But now a study has found it really does help people nod off-if it is milked from a cow at night.
Researchers have discovered that"night milk"contains more melatonin(褪黑激素),which has been proved to help people feel sleepy and reduce anxiety.
The study,by researchers from Seoul,South Korea,involved mice being fed with dried milk powder made from cows milked both during the day and at night.
Those given night milk,which contained 10 times the amount of melatonin,were less active and less anxious than those fed with the milk collected during daytime,according to the study published in The Journal of Medicinal Food.
Night milk quickened the start of sleep and caused the mice to sleep longer.
While the effect of cows milk harvested at different times has not been tested on humans up to now,taking melatonin drugs has been suggested to those who are struggling to fall asleep at night.
Previous studies have also indicated that milk can be excellent for helping sleep because of the calcium content,which helps people to relax.
Milk is also sugar-free and additive-free with nutritionists recommending skimmed milk as the best choice before bed as it is the least fattening.The more fat you take in before bedtime,the greater burden you will put on your body at night.

12.According to the text,the mice fed with daytime milkC.
A.started sleep more easily          
B.were less active
C.were more anxious                
D.woke up later
13.Which of the following is TRUE of melatonin according to the text?A
A.It's used in sleeping drugs 
B.It exists in milk in great amount
C.It can make people more energetic
D.It's been tested on mice for ten years
14.What can be a suitable title for the text?D
A.Milk Drinking and Health            
B.Fat,Sugar and Health
C.An Experiment on Mice          
D.Night Milk and Sleep
15.How does the author support the theme of the text?B
A.By giving examples.
B.By providing research results.
C.By explaining statistical data.
D.By stating arguments.

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