Over80percentofmanki的知识精选

  Over80percentofmankind’sdietisprovidedbytheseedsofles...
问题详情:  Over80percentofmankind’sdietisprovidedbytheseedsoflessthanadozenplantspecies.Buttheamountandvarietyofcropproductionhasbeenincreasingallthetime.  ____56____Forexample,Egyptianssettledalo...
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