科普知识类第一部分七年高考题荟萃年高考题1.（·陕西卷）DEversincetheywerefirstputonthemarketintheearly1990s,genticallymondified(GM,转基因)foodshavebeenincreasinglydevelopedandmarketedinmanycountriesintheword,mainlyonthebasisoftheirpromisetoendtheworldwidefoodcrisis.ButcanGMtechnologysolveworldhungerproblems?Evenifitwould,isitthebestsolutiorr?Despitewhatitpromiises,GMtechnologyactuallyhasnotincreasedtheproductionpotentialofanycorp.InfactStudiesshowthatthemostcrownGMcroo.GMsoybeans,hassufferedreducedproductivity.Forinstance,areportthananalysednearlytwodecadesofresearchonmojorGMfoodcropsshowsthatGMengineeringhasfailedtosignificantlyincreaseUScropproduction.Somethingelse,however,hasbeenontherise,WhileGMseedsareexpensive,GMcompanicstellfarmersthattheywillmakegoodprofitsbysavingmoneyonpesticides（杀虫剂）.Onthecontrary,USgovernmentdatashowthatGMcropsintheUShaveproducedanoverallincreaseinpesticideusecomparedtotraditionalcrops.“Thepromisewasthatyoucoulduselesschemicalsandboostproduction.Butnetheristrue,”saidBillChristison,PresidentoftheUSNationalFarmCoalition.Atthesametime,theauthorsofthebookWorldHunger:TwelveMythsarguethatthereactuallyismorethanenoughfoodintheworldandthatthehungercrisisisnotcausedbyproduction,butbyproblemsinfooddistributionandpolitics.Theseindeeddeserveoureffortsandmoney.Meanwhile,theriseinfoodpricesresultsfromtheincreaseduseofcropsforfuelratherthanfood,accordingtoaWorldBankreport.Asamatteroffact,scientistsseebetterwaystofeedtheworld.AnotherWorldBankreportconcludedthatGMcropshavelittletooffertothechallengesofworldwidepovertyandhunger,becausebetterwaysoutareavailable,amongwhich“green”farmingissupposedtobethefirstchoice.57.Theauthordevelopsthesecondparagraphmainly.【C】A.byclassificationB.bycomparisonC.byexampleD.byprocess58.Whatdoestheunderlinedword“boost”inthethirdparagraphprobablymean?【D】A.Control.B.EvaluateC.Obtain.D.Increase.59.GMcompaniespromisefarmersthattheywillbenefitfrom______________.【B】A.practicing“green”farmingB.useoflesschemicalsC.fairdistributionoftheircropsD.usingmorecropsforfuel60.WhichofthefollowingbestdescribestheattitudeoftheauthortowardsGMtechnology?【C】A.OptimisticB.DefensiveC.DisapprovingD.Casual2.（·重庆卷）CGettingridofdirt,intheopinionofmostpeople,isagoodthing.However,thereisnothingfixedaboutattitudestodirt.Intheearly16thcentury,peoplethoughtthatdirtontheskinwasameanstoblockoutdisease,asmedicalopinionhaditthatwashingoffdirtwithhotwatercouldopenuptheskinandletillsin.Aparticulardangerwasthoughttolieinpublicbaths.By1538,theFrenchkinghadclosedthebathhousesinhiskingdom.SodidthekingofEnglandin1546.ThusbeganalongtimewhentherichandthepoorinEuropelivedwithdirtinafriendlyway.HenryIV,KingofFrance,wasfamouslydirty.Uponlearningthatanoblemanhadtakenabath,thekingorderedthat,toavoidtheattackofdisease,thenoblemanshouldnotgoout.Thoughthebeliefinthemeritofdirtwaslong-lived,dirthasnolongerbeenregardedasaniceneighboreversincethe18thcentury.Scientificallyspeaking,cleaningawaydirtisgoodtohealth.Cleanwatersupplyandhandwashingarepracticalmeansofpreventingdisease.Yet,itseemsthatstandardsofcleanlinesshavemovedbeyondsciencesinceWorldWarⅡ.Advertisementsrepeatedlyselltheidea:clothesneedtobewhiterthanwhite,clothseversofter,surfacestoshine.Hasthehatefordirt,however,gonetoofar?Attitudestodirtstilldifferhugelynowadays.Manyfirst-timeparentsnervouslytrytowar...
