重庆大学网教作业答案-大学英语-(-第2次-).doc

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1、第2次作业一、阅读理解（本大题共100分，共5小题，每小题20分）1.Prehistoricmenandwomenenjoyedamorevarieddietthanpeopledonow,sincetheyatespeciesofplantandseveralhundredsthousandstypesoflivingthings.Butonlyatinypercentageofthesewereeverdomesticated.Modernshopshavehastenedatrendtowardsspecializationwhichbeg

2、anintheearliestdaysofagriculture.Thefoodoftherichcountrieshasbecomecheaperrelativetowages.Itisspeedilydistributedinsupermarkets.Butthechoiceannuallybecomeslessandlessgreat.Evenindividualfoodsthemselvesbecomemorestandardized.Weliveintheworldofcarrotspeciallybluntedinordertoavo

3、idmakingaholeinthebag,andthetomatogrowntomeetademandforastandardweightofweightingtomatoestoakilo.SirivonReisasks:"Onlythethreemajorcereals（谷物类食物）andperhapstenotherwidelycultivatedspeciesstandbetweenfamineandsurvivalfortheworld'shumanpopulationandahandfulofdrugplantshasservedW

4、esterncivilizationforseveralthousandyears.Aratherobviousquestionarises:Arewemissingsomething?"Afterall,thereare800000speciesofplantonearth.(1).Inprehistorictimespeople____.A.atemuchmorethanwedotodayB.livedmainlyonplantfoodC.hadawide-rangingdietD.weremorefussyaboutwhattheyate(

5、2).Mostofushavecometoexpect____.A.novariationinourdietB.areductioninfoodsuppliesC.aspecialistdietD.foodconformingtoasetstandard(3).Thespecializationoffoodwasstartedby____.A.theemergenceofsupermarketsB.theriseofagricultureC.therichcountriesD.themodernshops(4).Accordingtothepas

6、sage,peopleintheWesttodaysurviveon____.A.carrotsandtomatoesB.severalthousandtypesofplantsandcerealsC.averysmallnumberofcultivatedfoodsD.specialspeciesplantedonethousandyearsago(5).Theconclusionseemstobethatwe____.A.couldmakeuseofmorenaturalspeciesB.don'tcultivatetherightkindo

7、ffoodC.producemorefoodthanweneedD.cultivatetoomanydifferentspecies2.humanbodyisdistributed(分布)intwodifferentways.Somefatpeoplehavealargechestandnowaistline(腰身),lookingratherlikeapples.Othersarefatterbelowthewaist,lookingmorelikepears.DoctorsinCambridge,Englandhavebeenexaminin

8、gtherelationshipbetweenhealthandfat(脂肪)distribution.Theyfindthatthep