高考英语一轮复习 unit 5 nelson mandela-a modern hero单元检测卷[新人教版]必修1

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1、Unit5NelsonMandela-amodernheroⅠ.阅读理解You’reinabitofadilemmastandinginfrontoftheproducesectionofyourlocalsupermarket.Inonehand,you’reholdingaconventionallygrownGrannySmithapple.Inyourotherhand,youhaveonethat’sbeenorganicallygrown.Bothapplesarefirm,shinyandgreen.Bothprovidevitaminsandfiber,an

2、dbotharefreeoffat,sodium(钠)andcholesterol（胆固醇）.Theconventionallygrownapplecostslessandisaprovenfamilyfavorite.Buttheorganicapplehasalabelthatsays“USDAOrganic”.Doesthatmeanit’sbetter?Safer?Morenutritious?Severaldifferencesbetweenorganicandnon-organicfoodsexist.Becomeabetterinformedconsumerf

3、oryournexttriptothesupermarket.Theword“organic”referstothewayfarmersgrowandprocessagriculturalproducts,suchasfruits,vegetables,grains,dairyproductsandmeat.Organicfarmingpracticesaredesignedtoencouragesoilandwaterconservationandreducepollution.Farmerswhogroworganicproduceandmeatdon’tuseconv

4、entionalmethodstofertilize,controlweedsorpreventlivestockdisease.Hereareotherdifferencesbetweenconventionalfarmingandorganicfarming:ConventionalfarmersOrganicfarmersApplychemicalfertilizerstopromoteplantgrowth.Applynaturalfertilizerstofeedsoilandplants.Applyinsecticidestoreducepestsanddise

5、ase.Usebeneficialinsectsandbirdstoreducepestsanddisease.Giveanimalsantibiotics（抗生素）,growthhormones（激素）andmedicationstopreventdiseaseandpromotegrowth,housing.Giveanimalsorganicfoodandallowthemaccesstotheoutdoors.Usepreventivemeasures—suchasabalanceddietandcleanhousing—tohelpminimizedisease.

6、*Organicornot?Checkthelabel.TheU.S.DepartmentofAgriculture（USDA）hasestablishedanorganiccertificationprogramthatrequiresallorganicfoodstomeetstrictgovernmentstandards.Thesestandardsregulatehowsuchfoodsaregrown,handledandprocessed.Anyfarmerorfoodmanufacturerwholabelsandsellsaproductasorganic

7、mustbeUSDAcertifiedasmeetingthesestandards.Onlyproducerswhoselllessthan5,000ayearinorganicfoodsareexempt（免除）fromthiscertification.IfafoodbearsaUSDAOrganiclabel,itmeansit'sproducedandprocessed6accordingtotheUSDAstandards.Thesealisvoluntary,butmanyorganicproduc