首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
It is predicted that there will be four scientific breakthroughs in the 21st century. We’ll know where we came from. Why doe
It is predicted that there will be four scientific breakthroughs in the 21st century. We’ll know where we came from. Why doe
admin
2015-04-10
94
问题
It is predicted that there will be four scientific breakthroughs in the 21st century.
We’ll know where we came from. Why does the universe exist? To put it another way, why is there something instead of nothing? Since the 1920s, scientists have known the universe is expanding, which means it must have started at a definite time in the past. They even have developed theories that give a detailed picture of the evolution of the universe from the time it was a fraction of a second old to the present. Over the next couple of decades, these theories will be refined by data from extraordinary powerful new telescope.
We’ll crack the genetic code and conquer cancer. In 19th century operas, when the heroine coughs in the first act, the audience knows she will die of tuberculosis in Act 3. But thanks to 20th-century antibiotics, the once-dreaded, once-incurable disease now can mean nothing more serious than taking some pills. As scientists learn more about the genetic code and the way cells work at the molecular level, many serious diseases—cancer, for one—will become less threatening. Using manufactured "therapeutic" viruses, doctors will be able to replace cancer-causing damaged DNA with healthy genes, probably administered by a pill or injection.
We’ll live longer(120 years?). If the normal aging process is basically a furious, invisible contest in our cells—a contest between damage to our DNA and our cells’ ability to repair that damage—then 21st-century strides in genetic medicine may let us control and even reverse the process. But before we push scientists to do more, consider: Do we really want to live in a world where no one grows old and few children are born because the planet can hold only so many people? Where would new ideas come from? What would we do with all that extra time?
We’ll have a brain road map. This is the real final frontier of the 21st century: The brain is the most complex system we know. It contains about 100 billion neurons, each connected to as many as 1,000 others. In the 21st century, we will use advanced forms of magnetic resonance imaging to produce detailed maps of the neurons in operation. We’ll be able to say with certainty which ones are working when you read a word, when you say a word, when you think about a word, and so on.
From the second paragraph, we learn that the theory about the universe starting at a definite time is based on the evidence that
选项
A、there is something instead of nothing in the universe.
B、the evolution of the universe can be pictured in detail.
C、the universe is enlarging.
D、the data from new telescope refine the theories.
答案
C
解析
我们从第二段中可知,有关宇宙形成于某一特定时期的理论是基于下列哪项根据的?[A]宇宙中有物质存在而不是空无一物。[B]宇宙的演变可以详尽地描绘出来。[C]宇宙正在扩张。[D]新型望远镜所带来的数据使这些理论更加精确。根据题干中的关键词universe starting at a definite time可知相关信息出现在第二段。原文提到,自20世纪20年代以来,科学家已经了解到宇宙正在扩张。这就是说宇宙一定是在过去的某一特定时期开始形成的。which代表前半个分句theuniverse is expanding,所以[C]正确。[A]、[B]、[D]都是第二段中的内容,但是它们与题干所问的问题没有关系,是所答非所问式的干扰项。
转载请注明原文地址:https://kaotiyun.com/show/lD74777K
0
考研英语一
相关试题推荐
Energywillbeoneofthedefiningissuesofthiscentury.Onethingisclear:theeraofeasyoilisover.Whatwealldonext
Energywillbeoneofthedefiningissuesofthiscentury.Onethingisclear:theeraofeasyoilisover.Whatwealldonext
Intheearly1800s,groupsofEnglishworkerswreckedmachinesthattheyfeltthreatenedtheirjobs.(46)Theywerecalled"Ludd
ImagineaBriton’snewyearresolutions:hevowstostopsmoking20cigarettesaday,andabandonhisdailybottleofclaretand
TheFeaturesofSolarandWindEnergySolarandwindenergyseemtohavecapturedthepublic’ssupportaspotentiallybeing
TheFeaturesofSolarandWindEnergySolarandwindenergyseemtohavecapturedthepublic’ssupportaspotentiallybeing
TheFeaturesofSolarandWindEnergySolarandwindenergyseemtohavecapturedthepublic’ssupportaspotentiallybeing
AmericansBecomePessimisticfromOptimisticAmericanshavelongpridedthemselvesasbeingpartofanoptimisticsociety.B
______isoftenthecasewithanewidea,muchpreliminaryactivityandoptimisticdiscussionproducednoconcreteproposals.
随机试题
二维随机变量(X,Y)的概率密度为,-∞<x<+∞,-∞<y<+∞A的值;
在《冯谖客孟尝君》这篇文章中,凿成“三窟”的最主要人物是()
"Whenoneofthedoctorscriticizes(批评)me,Igetdefensive.Ifeellikeachildagain,beingscolded,andIwanttoexplainthat
A.湿法制粒压片B.干法制粒压片C.结晶压片法D.粉末直接压片E.空白颗粒法以下情况应选择什么片剂生产工艺药物的可压性不好,且在湿热条件下不稳定者
下列情况哪一种临床表现是皮脂腺囊肿所特有的?()
甲、乙、丙3家公司共同出资设立丁有限责任公司,其中丙公司以欺骗方式出具了虚假出资证明。丁公司成立后,丙公司以丁公司的名义向B银行借款100万元,用于自己的生产经营活动。后丁公司严重亏损无力偿债。关于本案,下列说法正确的是()。
因为某学生不遵守课堂纪律,某中学初一(3)班班主任陈老师就强令该学生家长到学校陪读,由于学生家长工作忙,不能来学校陪读,陈老师就把该学生赶出了校门,并对学生说:“你家长不来陪读,你就不准来学校上课。”陈老师的做法()
公安科技群众化的内容主要有()。
[*]
A、Clothesmatching.B、Makingfriends.C、Stressrelieving.D、Interviewpreparation.D题干考查讲习班的用途。对话中,男士询问这里是不是准备面试的讲习班,女士回答说这里是面试课
最新回复
(
0
)