(2018·威海)图为吊装工具示意图,物体M为重5000N的配重,杠杆AB的支点为O,OA∶OB=1∶2,每个...
问题详情：(2018·威海)图为吊装工具示意图,物体M为重5000N的配重,杠杆AB的支点为O,OA∶OB=1∶2,每个滑轮重100N。当重为700N的工人用300N的力竖直向下匀速拉动绳子时,工人对地面的压力为N,物体M对地面的压力为N。(杠杆...
用“OOA”造句大全，OOA造句
AOOAAnalysetoDealwiththeModelofAccount;Goodbackgroundofsoftwareengineering,familiarwiththeOOA/OOD/OOP.ThispaperusethetechnologyofOOAandDataBasetobuildasystemofWoundedMenClassifyingandDiagnosingbasedon...