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1、GoodorBad?Saccharin（糖精）istheonlytrulyman-madesweetener.Itwasdiscoveredbyaccident100yearsagoinanexperimentwithcoaltar（煤焦j由）.Intheexperiment,ascientistgotsomesubstance（whichlaterheknewwassaccharin）onhisfinger."Later,atdinner,heputhisfingerintohismouthandnoticedthesw
2、eettaste,"saysEricWalters,professorofbiochemistryattheChicagoMedicalSchool.Containingnocalories,saccharinisnotabsorbedbythehumanbody・Itbegantobedislikedbypeopleduringthelate1970sandearly1980swhenonesetofstudiesshowedthatitcausedcancerinlaboratoryanimals.Accordingt
3、oWalters,itisnotfairtosaccharinbecausethestudieswerenotperfect.Morerecenttestingwithotheranimalswithsmallamountsofsaccharinhasnotrepeatedthesameresults.Evenwiththeseexperimentalresults,saccharinlabelsarestillrequiredtocarryawarningsayingithasbeenshowntocausecancer
4、inlaboratoryanimals.In1990rsaccharinwasallowedtobesoldinthemarketagain.Becauseitishundredsoftimessweeterthantablesugar,onlyasmallamountofsaccharinisusedathome,inrestaurantsorinthefood-makingindustry.Anothersweetenerwecommonlyuseisaspartame（甜味剂）.Itisnotsosweetassac
5、charin,butmuchsweeterthantablesugar.Unlikesaccharin,however,aspartamecanbeabsorbedintothebody・Itcontains4caloriespergram,thesameastablesugar.Butaspartameis180timessweeterthansugar.Althoughaspartameisfoundinthousandsofproducts,itssafety,likesaccharin,hasstillbeenun
6、certain.Neverthelesszpeopleallowitsuseinallfoodsanddrinks."Inmyopinion,aspartameisassafeassugar一butthentherearethosewhothinkwhitesugarisdangerous/1saysWalters・"Betweenaspartameandsaccharin,Iwouldpickaspartame.Butatnormaluselevel®Ithinksaccharinissafetoo."1.Whental
7、kingaboutsaccharinandaspartame,EricWaltersmostprobablythinksthataspartameissaferthansaccharin.A.RightB.WrongC.Notmentioned正确的答案是：A2.Afterdoingmanyexperiments#Waltersfinallyfoundsaccharinatdinner.A.RightB.WrongC.Notmentioned正确的答案是：B1.Aspartameissweeterthansaccharin
8、wheninhotdrinks.A.RightB.WrongC.Notmentioned正确的答案是：c2.Becausesaccharinwasreportedtohavecausedcancerinlabanimalsritgotabadname.A.RightB.WrongC.Notmention
