2016届高考英语一轮复习 module4 great scientists考点规范练22（含解析）外研版必修4

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1、【志鸿优化设计】2016届高考英语一轮复习Module4GreatScientists考点规范练22（含解析）外研版必修4Ⅰ.阅读理解ANotallresearchbeginswithaplan.Somestudiesbeginbyaccident.MeredithSchafersaysthatiswhathappenedtoherandCynthiaSagers.CynthiaSagersisabiologyprofessorattheUniversityofArkansas.MeredithSchaferisagraduatestudent.Theyweretraveli

2、nginthestateofNorthDakotaonaproject.Theynoticedprettyyellowflowers.Theyrecognizedthemascanola.Farmersgrowcanolaforseedstomakecookingoil.Butthecanolaplantstheysawwerenotgrowinginfarmfields.Theyweregrowingalongtheroad.Theresearchersdecidedtotesttheplants.Theyhadbroughtalongspecialtestingpaper

3、sfortheprojecttheywereworkingon.Theresultsshowedthattheweedycanolaplantscontainedgeneticchanges.Ifaplantisgeneticallymodified,thatmeansitsgeneshavebeenchangedtoproducedesiredqualities.Thissummer,theresearchersfromArkansaswentbacktoNorthDakota.Thistimetheywentonaroadtriptofindcanola.Theytrav

4、eledmorethan5thousandkilometers.Whattheyfound,theysay,wasthefirstdiscoveryintheUnitedStatesofwildcanolaplantswithmodifiedgenes.Thescientistsfoundcanolaplantsinalmosthalfoftheplacestheyinvestigated.Theytestedatotalof288plants.Theyfoundthat80%ofthoseplantscontainedgenesfromgeneticallyengineer

5、edcanola.Somecropplantsaremodifiedtoresistdamagefromthechemicalsthatfarmersusetokillweeds.Thereare2proteinsthatcangivecanolatheabilitytoresist2commonlyusedweedkillers.Oneproteingivesresistanceagainstglyphosate.Theotherproteingivesresistanceagainstglufosinate.1.WhichofthefollowingaboutMeredi

6、thSchaferisNOTtrue?A.MeredithSchaferisafemale.B.MeredithSchaferisagraduatestudent.C.MeredithSchaferisthefirstpersonwhodiscoveredwildcanolaplantswithmodifiedgenesintheUS.D.MeredithSchafercomesfromthestateofNorthDakota.2.WhywerethecanolaplantstestedbyMeredithSchaferandCynthiaSagersgrowingalon

7、gtheroad?A.Becausetheweathertherewasspecial.B.Becausetheywerewildcanolaplants.C.Becausetheirgeneshadbeenchanged.D.Becausetheywereplantedtherebyfarmers.3.Howmanyplantstestedbythescientistscontainedgenesfromgeneticallyengineeredcanola?A.About58plants.B.Abo