A61的精选

问题详情：设等比数列的前项和为，若，，则（  ）A.61                 B.62                 C.63                 D.75【回答】C【解析】分析：利用等比数列*质求.详解：由...

问题详情：Tosupporthissickwifeandearnapaycheck,a61-year-oldIowamannamedSteveSimoffsometimeswalks35milestohisjobasanovernightgatekeeper.Simofsaidthatheleaveshisbasementapartmentinasmalltownatabout3:30p.m...

问题详情：阅读短文，掌握其大意，从每题所给的A、B、C、D四个选项中，选出最佳选项。WangFengqin,a61-year-oldwomaninBeijing,volunteerstosort(分类)rubbishinherlivingareainBeijing’sChaoyangDistrict.At6:30everymorni...