大学英语（3）第二次作业题及答案

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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.Modernshopshavehastenedatrendtowardsspecial

2、izationwhichbeganintheearliestdaysofagriculture.Thefoodoftherichcountrieshasbecomecheaperrelativetowages.Itisspeedilydistributedinsupermarkets.Butthechoiceannuallybecomeslessandlessgreat.Evenindividualfoodsthemselvesbecomemorestandardized.Weliveintheworldofcarr

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

4、anpopulationandahandfulofdrugplantshasservedWesterncivilizationforseveralthousandyears.Aratherobviousquestionarises:Arewemissingsomething?"Afterall,thereare800000speciesofplantonearth.(1).Inprehistorictimespeople____.A.atemuchmorethanwedotodayB.livedmainlyonpla

5、ntfoodC.hadawide-rangingdietD.weremorefussyaboutwhattheyate(2).Mostofushavecometoexpect____.A.novariationinourdietB.areductioninfoodsuppliesC.aspecialistdietD.foodconformingtoasetstandard(3).Thespecializationoffoodwasstartedby____.A.theemergenceofsupermarketsB.

6、theriseofagricultureC.therichcountriesD.themodernshops(4).Accordingtothepassage,peopleintheWesttodaysurviveon____.A.carrotsandtomatoesB.severalthousandtypesofplantsandcerealsC.averysmallnumberofcultivatedfoodsD.specialspeciesplantedonethousandyearsago(5).Thecon

7、clusionseemstobethatwe____.A.couldmakeuseofmorenaturalspeciesB.don'tcultivatetherightkindoffoodC.producemorefoodthanweneedD.cultivatetoomanydifferentspecies2.humanbodyisdistributed(分布)intwodifferentways.Somefatpeoplehavealargechestandnowaistline(腰身),lookingrath

8、erlikeapples.Othersarefatterbelowthewaist,lookingmorelikepears.DoctorsinCambridge,Englandhavebeenexaminingtherelationshipbetweenhealthandfat(脂肪)distribution.Theyfindthatthep