2022年职称英语阅读理解练习题(3)3

2022年职称英语阅读理解练习题(3)3Experimentsunderwayinseverallabsaimtocreatebeneficialtypesofgeneticallymodified（GM）foods,includingstarchierpotatoesandcaffeine-freecoffeebeans.Geneticengineersareeventryingtotransfergenesfromacold-waterfishtomakeafrost-resistanttomato.

Alow-sugarGMstrawberrynowintheworksmightonedayallowpeoplewithhealthproblemssuchasdiabetestoenjoythelittledeliciousredfruitsagain.GMbeansandgrainssuperchargedwithproteinmighthelppeopleatriskofdevelopingkwashiorkor,Kwashiorkor,adiseasecausedbyseverelackofprotein,iscommoninpartsoftheworldwherethereareseverefoodshortages.

CommentingonGMfoods,JonathonJones,aBritishresearcher,said:“Thefuturebenefitswillbeenormous,andthebestisyettocome.”

Tosomepeople,GMfoodsarenodifferentfromunmodifiedfoods.“Atomatoisatomato,”saidBrianSansoni,anAmericanfoodmanufacturer.

CriticsofGMfoodschallengeSansoni’sopinion.TheyworryabouttheharmthatGMcropsmightdotopeople,otheranimals,andplants.

InarecentlabstudyconductedatCornellUniversity,scientiststestedpollenmadebyBtcorn,whichmakesupone-fourthoftheU.S.corncrop.Thescientistsprinkledthepollenontomilkweed,aplantthatmakesamilkyjuiceandistheonlyknownfoodsourceofthemonarchbutterflycaterpillar.Withinfourdaysofmunchingonthemilkweedleaves,almosthalfofatestgroupofcaterpillarshaddied.“Monarchsareconsideredtobeaflagshipspeciesforconservation,”saidCornellresearcherLindaRaynor.“Thisisawarningbell.”

SomeinsectsthatarenotkilledbyGMfoodsmightfindthemselvesmadestronger.Howso?Theinsecticidesusedtoprotectmostoftoday’scropsaresprayedonthecropswhenneededanddecayquicklyintheenvironment.ButGMplantsproduceacontinuouslevelofinsecticide.Insectspeciesfeedingonthosecropsmaydevelopresistancetotheplantsandcoulddosoinahurry,saythecritics.InsectsmayalsodeveloparesistancetotheinsecticideBt.

AttheforumonGMfoodheldlastyearinCanada.GMcropsthathavebeenmaderesistanttotheherbicidemightcrossbreedwithwildplants,creating“superweeds”thatcouldtakeoverwholefields.

Sowheredoyoustand?ShouldGMfoodsbebannedintheUnitedStates,astheyareinpartsofEurope?Ordotheirbenefitsoutweighanyoftheriskstheymightcarry?

1.Paragraphs1,2&3triestogivetheideathat

A.GMfoodsmaybringaboutgreatbenefitstohumans.

B.wecannotrecognizethebenefitsofGMfoodstooearly.

C.GMfoodsmayhavebothbenefitsandharm.

D.GMfoodsareparticularlygoodtothekwashiorkorpatients.

2.Whyisthecaseofthepollen-sprayedmilkweedcitedinParagraph6?

A.ItiscitedtoshowGMfoodscankillinsectseffectively.

B.ItiscitedtoshowGMfoodscontainmoreprotein.

C.ItiscitedtoshowGMfoodsalsohaveadarkside.

D.ItiscitedtoshowGMfoodsmayharmcrops.

3.Whathappenstothoseinsectswhennotkilledbythesprayofinsecticide?

A.Theymaylosetheirabilitytoproduceoffspring.

B.Theymayhaveahigherabilitytoadapttotheenvironment.

C.Theymovetootherfieldsfreefrominsecticide.

D.Theynevereatagainthoseplantscontaininginsecticide.

4.WhichofthefollowingstatementsconcerningbanningGMfoodsistrueaccordingtothepassage?

A.UnderdevelopedcountrieshavebannedGMfoods.

B.BothEuropeandtheU.S.havebannedGMfoods.

C.MostEuropeancountrieshavenotbannedGMfoods.

D.TheUnitedStateshasnotbannedGMfoods.

5.Whatisthewriter’sattitudetoGMfood