六級英語閱讀理解練習(xí)題及答案

1、導(dǎo)讀：我根據(jù)大家的需要整理了一份關(guān)于六級英語閱讀理解練習(xí)題及答案的內(nèi)容，具體內(nèi)容：閱讀理解是六級考試中的必考題型，在剩下的備考時間里必須抓緊閱讀練習(xí)，下面我為大家?guī)恚瑲g迎考生閱讀練習(xí)。六 級英語閱讀理解練習(xí)題 1A erupte.閱讀理解是六級考試中的必考題型，在剩下的備考時間里必須抓緊閱讀 練習(xí)，下面我為大家?guī)恚瑲g迎考生閱讀練習(xí)。六級英語閱讀理解練習(xí)題 1A controversy erupted scientific early 1998over use DNA(deoxyribonucleic acid ) fingerprinting incriminal investigatio

2、ns. DNA fingerprinting wasintroduced 1987as a method to identify individuals based on a pattern seen theirDNA,the molecule of which genes are made. present in everycell of the body except redblood cells. DNA fingerprinting has used successfully various ways, as todetermine paternitywhere it is not c

3、lear the father of particular child is. However,it isin area investigations that DNA fingerprinting has potentially andcontroversial uses.DNA fingerprinting and other analysis haverevolutionized criminalinvestigations by giving investigatorspowerful tools in the attempt to trove guilt, not justestab

4、lish1 8innocence. When used criminal investigations, a fingerprintpattern asuspect compared with a fingerprint obtained material as hairs orblood at scene ofa A between two DNA samples can be used asevidence to convict a suspect.The controversy 1998 stemmed form a report published December bypopulat

5、ion geneticists Richard Lewontin ofHarvard University in Cambridge, Mass., andDaniel L. Hartl calledinto question methods to calculate how likely it is that amatchbetween DNA fingerprints might occur by chance alone. Inparticular, argued that thecurrent method cannot properlydetermine likelihood DNA

6、 samples will matchbecause theycame from the same individual rather than simply from two differentindividualswho members of the same ethnic group. Lewontin Hartl called better surveys of DNApatterns adequate.In response to their criticisms, population geneticists RanajitChakraborty theUniversity of

7、Texas in Dallas and K.Kiddof University in New Haven, Conn.,argued that enough data arealready available that the methods currently being usedareadequate. January 1998, however, the federal Bureau ofInvestigation and laboratoriesthat conduct tests thatthey would collect additional DNA samples formva

8、rious ethnic groups2 8in an attempt to resolve some of these questions. And, in April,aNational Academy Sciences called for strict standards system of accreditation for DNAtesting laboratories.六級英語閱讀理解練習(xí)題1.Before fingerprinting is used, suspects_.A.would to fingerprints further investigationsB.would

9、 to submit evidence for their innocenceC.could easily escape conviction of guiltD.cold be convicted of guilt as well2.DNA fingerprinting can be unreliable when _.A.the methods used for blood- cell calculation are not accurateB.two different individuals the same group have the same fingerprintingpatt

10、ernC.a match is by chance left with fingerprints that happen to belong to differentindividualsD.two different individuals leave DNA samples.3.To like Lewontin and Hartl, the current method _.A.is so convincing as to exclude likelihood that two DNA samples nevercome from two individualsB.is arguable

11、because two individuals of the ethnic group are likely to the pattern.3 8C.Is based on adequate scientific theory of geneticsD.Is theoretically contradictory what been 4.The attitude Federal Bereau Investigation shows that _.A.enough are yet be form various ethnic groupsto confirm the unlikelihoodof

12、 DNA samples coming from two individual membersB.enough of DNA samples should be collected to confirm that only samples formthe person can matchC.enough are yet be from various ethnic groupsto determine thelikelihood of different samples coming form the personD.additional samples from various ethnic

13、 groups should collected to determine thattwo DNA samples are unlikely to come from the person5.National Academy Sciences holds the stance that _. A.DNA testing should be systematizedB.Only authorized laboratories can conduct DNA testingC.The academy only is authorized to out standards for testingD.

14、The academy has the right to accredit laboratories DNA testing六級英語閱讀理解練習(xí)題答案4 8CBABB六級英語閱讀理解練習(xí)題 2Racket, clamor, noise, whatever you want to call unwantedsound is Americas mostwidespread nuisance. But noise is more thanjust a nuisance. It constitutes real presentdanger to peopleshealth. and night, at

15、 home, at work, and at play, noise produceserious and psychological stress. No is to stress. we seemto adjust to noise by ignoring the in never closes and the body stillrespondssometimes extreme tension, as to a strange sound the night.The annoyance we when faced with noise is the most commonoutward

16、 ofthe stress building up inside Indeed, irritability is apparent, legislators havemade public annoyancethe basis of many noise abatement programs. The more subtle andmoreserious health hazards associated stress caused by noisetraditionally beengiven much less attention. Nevertheless,when we are or

17、made irritable by noise, weshould these symptoms fair warning other thing may be happening to us, ofwhich may be damaging to our health.Of health hazards to loss is the most clearlyobservable andmeasurable by health professionals. The other hazards5 8are harder to down. many of us,there risk thatexp

18、osure to the of noise increases susceptibility todiseaseand more susceptible among may experiencenoise as a complicating heart problems and other diseases.Noise causes annoyance and irritability healthpersons mayhave serious consequences for these already in mind or body.Noise affects throughout our

19、 For example, there indications effects theunborn when are exposedto environmental noise. During infancyand childhood,youngsters exposed high noise levels may have falling asleep andobtaining necessary amounts of rest.Why, then, is greater alarm about these dangers? Perhapsit is because the linkbetw

20、een noise and many disabilities ordiseases not been conclusively demonstrated.Perhaps it isbecause we tend to dismiss annoyance as a price to for livingin modernworld. It may also be because we still think of hearing loss as only an occupational hazard.六級英語閱讀理解練習(xí)題1.In Paragraph 1, phrase immune to are to A.unaffected B.hurt byC.unli