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1、99年改错Thehunter-gatherertribesthattodayliveasourprehistoric1.______humanancestorsconsumeprimarilyavegetabledietsupplementing2._____withanimalfoods.Ananalysisof58societiesofmodemhunter-gatherers,includingtheKungofsouthernAfrica,revealedthatonehalfemphasizegatheringplantfoods,one-thirdconcentrat
2、eonfishingandonlyone-sixthareprimarilyhunters.Overall,two-thirdsandmoreofthehunter-gatherer’scaloriescomefromplants.Detailed3.______studiesoftheKungbythefoodscientistsattheUniversityofLondon,showedthatgatheringisamoreproductivesourceoffoodthanishunting.Anhourofhuntingyieldsinaverageabout1004.
3、______ediblecalories,asanhourofgatheringproduces240.5.______Plantfoodsprovidefor60percentto80percentoftheKung6._______diet,andnoonegoeshungrywhenthehuntfails.Interestingly,iftheyescapefatalinfectionsoraccidents,thesecontemporaryaborigineslivetooldagesdespiteoftheabsenceofmedicalcare.7._______
4、Theyexperiencenoobesity,nomiddle-agedspread,littledentaldecay,nohighbloodpressure,onheartdisease,andtheirbloodcholesterollevelsareverylow(abouthalfoftheaverageAmerican8._______adult),ifnooneissuggestingwhatwereturntoanaboriginallife9.________style,wecertainlycouldusetheireatinghabitsasamodelf
5、or10.________healthierdiet.2000改错ThegrammaticalwordswhichplaysolargeapartinEnglish grammarareforthemostpartsharplyandobviouslydifferent1._______ fromthelexicalwords.Aroughandreadydifferencewhichmay seemthemostobviousisthatgrammaticalwordshave“less meaning”,butinfactsomegrammarianshavecall
6、edthem2._______ “empty”wordsasopposedinthe“full”wordsofvocabulary.3.________ Butthisisarathermisledwayofexpressingthedistinction.4._________ Althoughawordliketheisnotthenameofsomethingasmanis, itisveryfarawayfrombeingmeaningless;thereisasharp5._________ differenceinmeaningbetween“manisvi
7、leand”“themanis vile”,yettheisthesinglevehicleofthisdifferenceinmeaning.6.________ Moreover,grammaticalwordsdifferconsiderablyamong themselvesastheamountofmeaningtheyhave,eveninthe7.________ lexicalsense.Anothernameforthegrammaticalwords