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1、Unit4 GlobalwarmingⅠ.阅读理解A(2015陕西,C)Theproductionofcoffeebeansisahuge,profitablebusiness,but,unfortunately,full-sunproductionistakingovertheindustryandbringingaboutalotofdamage.Thechangeinhowcoffeeisgrownfromshade-grownproductiontofull-sunproductionendange
2、rstheveryexistenceofcertainanimalsandbirds,andevendisturbstheworld'secologicalbalance.Onalocallevel,thedamageoftheforestrequiredbyfull-sunfieldsaffectsthearea'sbirdsandanimals.Theshadeoftheforesttreesprovidesahomeforbirdsandotherspecies(物种)thatdependonthet
3、rees'flowersandfruits.Full-suncoffeegrowersdestroythisforesthome.Asaresult,manyspeciesarequicklydyingout.Onamoregloballevel,thedestructionoftherainforestforfull-suncoffeefieldsalsothreatens(威胁)humanlife.Medicalresearchoftenmakesuseoftheforests'plantandanim
4、allife,andthedestructionofsuchspeciescouldpreventresearchersfromfindingcuresforcertaindiseases.Inaddition,newcoffee-growingtechniquesarepoisoningthewaterlocally,andeventuallytheworld'sgroundwater.Bothlocallyandglobally,thecontinuedspreadoffull-suncoffeepla
5、ntations(种植园)couldmeanthedestructionoftherainforestecology.Thelossofshadetreesisalreadycausingaslightchangeintheworld'sclimate,andstudiesshowthatthelossofoxygen-givingtreesalsoleadstoairpollutionandglobalwarming.Moreover,thenewgrowingtechniquesarecontribut
6、ingtoacidic(酸性的)soilconditions.Itisobviousthatthewaymuchcoffeeisgrownaffectsmanyaspectsoflife,fromthelocalenvironmenttotheglobalecology.Butconsumersdohaveachoice.Theycanpurchaseshade-growncoffeewheneverpossible,althoughatahighercost.Thefuturehealthofthepla
7、netandmankindissurelyworthmorethananinexpensivecupofcoffee.1.Whatcanwelearnaboutfull-suncoffeeproductionfromParagraph4?A.Itlimitsthespreadofnewgrowingtechniques.B.Itleadstoairpollutionandglobalwarming.C.Itslowsdownthelossofshadetrees.D.Itimproveslocalsoilc
8、onditions.2.Thepurposeofthetextisto . A.entertainB.advertiseC.instructD.persuade3.Wheredoesthistextprobablycomefrom?A.Anagriculturalmagazine.B.Amedicaljournal.C.Anengineeringtextbook.D.Atouristguide.4.Which
