Simone职称英语考试真题及答案理工A补全短文
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职称英语考试真题及答案：理工A补全短文
第四部分补全短文
ResearchersDiscoverWhyHumansBeganWalkingUpright
Mostofuswalkandcarryitemsinourhandseveryday.Theseareseeminglysimpleactivitiesthatthemajorityofusdon’tquestion.Butaninternationalteamofresearchers,includingDr.RichmondfromGW’sColumbianCollegeofArtsandSciences，havediscoveredthathumanwalkingupright,mayhaveoriginatedmillionsofyearsagoasanadaptationtocarryingscarce,high-qualityresources.TheteamofresearchersfromtheU.S.,England,JapanandPortugalinvestigatedthebehaviorofmodern-daychimpanzeesastheycompetedforfoodresources，inanefforttounderstandwhatecologicalsettingswouldleadalargeape—onethatresemblesthe6million-yearoldancestorwesharedincommonwithlivingchimpanzees—towalkontwolegs.
“Thesechimpanzeesprovideamodeloftheecologicalconditionsunderwhichourearliestancestorsmighthavebegunwalkingontwolegs,“，saidDr.Richmond.
Theresearchfindingssuggestthatchimpanzeesswitchtomovingontwolimbsinsteadoffourinsituationswheretheyneedtomonopolizearesource.Standingontwolegsallowsthemtocarrymuchmoreatonetimebecauseitfreesuptheirhands.Overtime，intenseburstsofbipedalactivitymayhaveledtoanatomicalchangesthatinturnbecamethesubjectofnaturalselectionwherecompetitionforfoodorotherresourceswasstrong.
TwostudieswereconductedbytheteaminGuinea.ThefirststudywasconductedbytheteaminKyotoUniversity’s“outdoorlaboratory”inanaturalclearinginBossouForest.Researchersallowedthewildchimpanzeesaccesstodifferentcombinationsoftwodifferenttypesofnut—theoilpalmnut，whichisnaturallywidelyavailable,andthecoulanut,whichisnot.Thechimpanzees’behaviorwasmonitoredinthreesituations:(a)whenonlyoilpalmnutswereavailable,(b)whenasmallnumberofcoulanutswereavailable，and(c)whencoulanutswerethemajorityavailableresource.
Whentherarecoulanutswereavailableonlyinsmallnumbers,thechimpanzeestransportedmoreatonetime.Similarly,whencoulanutswerethemajorityresource,thechimpanzeesignoredtheoilpalmnutsaltogether.Thechimpanzeesregardedthecoulanutsasamorehighly-prizedresourceandcompetedforthemmoreintensely.
Insuchhigh-competitionsettings，thefrequencyofcasesinwhichthechimpanzeesstartedmovingontwolegsincreasedbyafactoroffour.Notonlywasitobviousthatbipedalmovementallowedthemtocarrymoreofthispreciousresource,butalsothattheywereactivelytryingtomoveasmuchastheycouldinonegobyusingeverythingavailable一eventheirmouths.
Thesecondstudy,byKimberleyHockingsofOxfordBrookesUniversity,wasa14-monthstudyofBossouchimpanzeescrop-raiding,asituationinwhichtheyhavetocompeteforrareandunpredictableResources.Here,35percentofthechimpanzeesactivityinvolvedsomesortofbipedalmovement,andonceagain,thisbehaviorappearedtobelinkedtoaclearattempttocarryasmuchaspossibleatonetime.
参考答案：BAEFC
