历年考研英语模拟试题及答案：阅读篇

1、历年考研英语模拟试题及答案：阅读篇导读：本文 历年考研英语模拟试题及答案：阅读篇 ，仅供参考，如果 觉得很不错，欢迎点评和分享。Scientists have known since 1952 that DNA is the basic stuff ofheredity. Theyve known its chemical structure since 1953. They knowthat human DNA acts like a biological computer program some 3 billionbits long that spells out the instruc

2、tions for making proteins ， the basicbuilding blocks of life.But everything the genetic engineers have accomplished during thepast half-century is just a preamble to the work that Collins and Andersonand legions of colleagues are doing now. Collins leads the HumanGenome Project， a 15-year effort tod

3、raw the first detailed map of every nook and cranny and gene in humanDNA. Anderson ，who pioneered the first successful human gene-therapyoperations ， is leading the campaign to put information about DNA to useas quickly as possible in the treatment and prevention of human diseases.What they and othe

4、r researchers are plotting is nothing less than abiomedical revolution. Like Silicon Valley pirates reverse-engineering acomputer chip to steal a competitors secrets ， genetic engineers aredecoding lifes molecular secrets and trying to use that knowledge toreverse the natural course of disease. DNA

5、in their hands has becomeboth a blueprint and a drug ， a pharmacological substance ofextraordinary potency that can treat not just symptoms or the diseasesthat cause them but also the imperfections in DNA that make peoplesusceptible to a disease.And thats just the beginning. For all the fevered work

6、 being done ，however ， science is still far away from the Brave New World vision ofengineering a perfect human or even aperfect tomato. Much more research is needed before gene therapybecomes commonplace， and many diseases will takedecades to conquer ， if they can be conquered at all.In the short ru

7、n ， the most practical way to use the new technologywill be in genetic screening. Doctors will be able to detect all sorts of flawsin DNA long before they can be fixed. In some cases the knowledge mayleadto treatments that delay the onset of the disease or softenits effects. Someone with a genetic p

8、redisposition to heart disease ， forexample ， could follow a low-fat diet. And if scientists determine that avital protein is missing because thegene that was supposed to make it is defectivethey mightbe able to give the patient an artificial version of the protein.But in other instances ， almost no

9、thing can be done to stop the ravagesbrought on by genetic mutations. (409 words)1. It can be inferred from the text that Collins and Anderson andlegions of colleagues _.A know that human DNA acts like a biological computer programB have found the basic building blocks of lifeC have accomplished som

10、e genetic discovery during thepast half-centuryD are making a breakthrough in DNA2. Collins and Anderson are cited in the text to indicate allthe following EXCEPT that _ .A time-consuming effort is needed to accomplish the detailed mapof in human DNAB human gene-therapy operations may be applied to

11、the patientsC gene-therapy now is already generally used to the treatment andprevention of human diseasesD information about DNA may be used in the treatmentand prevention of human diseasesA one who robs at sea or plunders the land from the seaB one who makes use of or reproduces the work of another

12、3. The wordpirate(linpear2agraph，without authorizationC to take (something) by piracyD to make use of or reproduce (anothers work) withoutauthorization4. We can draw a conclusion from the text that_ .A engineering a perfect human is not feasible for the time beingB it simpossible for scientists to e

13、n gineer a perfect tomatoC many diseases will never be conquered by human beingsD doctors will be able to cure all sorts of flaws in DNA in thelong run5. The best title for the text may be _ .A DNA and HeredityB The Genetic RevolutionC A Biomedical RevolutionD How to Apply Genetic Technology词汇注释stuf

14、f 物质preamble 开端nook and cranny 排列potency 力量susceptible 易受感染的predisposition 易患病的体质 难句讲解1. They know that human DNA acts like a biological computerprogram some 3 billion bits long that spells out the instructions for makingproteins ， the basic building blocks of life.简析本句话的主干是“ They know that they ”指的

15、是前 面句子中提到的 scientists; 第一个引导的是宾语从句， some 3 billion bits long 修饰 computer program ，第二个 that 也修饰 computer program;the basicbuilding blocks of life 是在解释 proteins.2. Anderson ， who pioneered the first successful humangene-therapy operations ， is leading the campaign to put informationabout DNA to use as

16、 quickly as possible in the treatment and preventionof human diseases. 简 析 本 句 话 的 主 干 是 “ Anderson is leading thecampaign ” Who 引导的非限定性定语从句，修饰 Anderson;toput information短语修饰 mpaign，其中的 to use作目的状语。3. DNA in their hands has become both a blueprint and a drug ， apharmacological substance of extraordi

17、nary potencythat can treat not just symptoms or the diseases that cause them but alsothe imperfections in DNA that make people susceptible to a disease.简析 本句话的主干是“DNA has become both a blueprintand a drug ”。in their hands 修饰 DNA;a pharmacological substanee是在解释前面的 irug ,其中的第一个 that 引导的定语从句修饰 pharmacological substance; 第二个 that 引导的定语从句 修饰imperfections.4. And if scientists determine that a vital protein is missingbecause the gene that was