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wastheonefieldofawarenessaboutwhichhumanshadanythingmorethanthevaguestofinsights.ItisimpossibletoknowtodayjustwhatourStoneAgeancestorsknewaboutplants,butfromwhatwecanobserveofpreindustrialsocietiesthatstillexist,adetailedlearningofplantsandtheirpropertiesmustbeextremelyancient.Thisislogical.Plantsarethebasisofthefoodpyramidforalllivingthings,evenforotherplants.Theyhavealwaysbeenenormouslyimportanttothewelfareofpeople,notonlyforfood,butalsoforclothing,weapons,tools,dyes,medicines,shelter,andagreatmanyotherpurposes.TribeslivingtodayinthejunglesoftheAmazonrecognizeliterallyhundredsofplantsandknowmanypropertiesofeach.Tothembotany,assuch,hasnonameandisprobablynotevenrecognizedasaspecialbranchof"knowledge"atall.Unfortunately,themoreindustrializedwebecomethefartherawaywemovefromdirectcontactwithplants,andthelessdistinctourknowledgeofbotanygrows.Yeteveryonecomesunconsciouslyonanamazingamountofbotanicalknowledge,andfewpeoplewillfailtorecognizearose,anapple,oranorchid.WhenourNeolithic（新石器时代）ancestors,livinginthemiddleEastabout10,000yearsago,discoveredthatcertaingrassescouldbeharvestedandtheirseedsplantedforricheryieldsthenextseason,thefirstgreatstepinanewassociationofplantsandhumanswastaken.Grainswerediscoveredandfromthemflowedthemarvelofagriculture:cultivatedcrops.Fromthenon,humanswouldincreasinglytaketheirlivingfromthecontrolledproductionofafewplants,ratherthangettingalittlehereandalittletherefrommanyvarietiesthatgrewwild---andtheaccumulatedknowledgeoftensofthousandsofyearsofexperienceandintimacywithplantsinthewildwouldbegintofadeaway.--------------------------------------------------------------------------------1.Whichofthefollowingassumptionsaboutearlyhumansisexpressedinthepassage?A.Theyprobablyhadadetailedlearningofplants.B.Theyenjoyedthestudyofwelfare.C.Theyattachedmuchimportancetotheirproperty.D.Theythoughtthatcultivatingcropswerenotimportant.正确答案:Theyprobablyhadadetailedlearningofplants.题目详解:根据问题中‘assumptionsaboutearlyhumansisexpressed’的提示，从第1段的第3句中‘adetailedlearning
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