专8模拟试题二

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1、TESTFORENGLISHMAJORS(2008)-GRADEEIGHT-PAPERONETIMELIMIT:95MIN.PARTILISTENINGCOMPREHENSION[略]PARTIIPROOFREADING&ERRORCORRECTION[15MIN.]ThefollowingpassagecontainsTENerrors.EachindicatedlinecontainsamaximumofONEerror.Ineachcase,onlyONEwordisinvolved.Youshouldproof-readth

2、epassageandcorrectitinthefollowingway:Forawrongword,underlinethewrongwordandwritethecorrectoneintheblankprovidedattheendoftheline.Foramissingword,markthepositionofthemissingwordwitha"/"signandwritethewordyoubelievetobemissingintheblankprovidedattheendoftheline.Foranun

3、necessaryword,crosstheunnecessarywordwithaslash"/"andputthewordintheblankprovidedattheendoftheline.Oneimportantoutcomeoftheworkontheexpressionofgenesindevelopingembryosissuretobeknowledgethatcanhelppreventingbirthdefects.Justaspromising(1)isthepossibilityofunravelingth

4、ecomplicatedwriting(2)ofthebrain.Amechanicgetsvaluableinsighthowan(3)automobileworksbyrebuildingcarengines;similarly,neuroscientistscanlearnhowthebrainfunctionsfrom(4)thewayitisputtogether.Thenextsteppursuingthe(5)goalistofindouthowtheblueprintgenes,thehomeboxgenes,con

5、troltheexpressionofothergenesthatcreatethevalvesandpistonoftheworkingcerebralengine.Theproteinencodedbythelattergenescouldchangethe(6)stickinessofthecellsurface,theshapeofthecelloritsmetabolismtocreatethecharacteristicpeculiarto,say,neuronsorneural-crestcell.Surfacepro

6、teinsmaybethe(7)mechanism,wherebysimilarprogrammedcellssticktogethertoformspecificstructures;theymightalsosense(8)thelocalenvironmenttohelpthecelldecidewhatistodo.Clarifyingthosemechanismswillengagethebesttalentsin(9)embryologyandmolecularbiologyforsometimestocome.(10)

7、Whatisperhapsthemostintriguingquestionofallisifthebrainispowerfulenoughtosolvethepuzzleofitsowncreation.PARTIIIREADINGCOMPREHENSION[40MIN.]Inthissectiontherearefourreadingpassagesfollowedbyatotaloffifteenmultiple-choicequestions.Readthepassagesandthenmarkyouranswersony

8、ourcoloredanswersheet.PARTIIIREADINGCOMPREHENSION(40MIN.)Inthissectiontherearefourreadingpassagesfollowedbyfifteenmul