(2018·威海)圖爲吊裝工具示意圖,物體M爲重5000N的配重,槓桿AB的支點爲O,OA∶OB=1∶2,每個...
問題詳情：(2018·威海)圖爲吊裝工具示意圖,物體M爲重5000N的配重,槓桿AB的支點爲O,OA∶OB=1∶2,每個滑輪重100N。當重爲700N的工人用300N的力豎直向下勻速拉動繩子時,工人對地面的壓力爲N,物體M對地面的壓力爲N。(槓桿...
用“OOA”造句大全，OOA造句
AOOAAnalysetoDealwiththeModelofAccount;Goodbackgroundofsoftwareengineering,familiarwiththeOOA/OOD/OOP.ThispaperusethetechnologyofOOAandDataBasetobuildasystemofWoundedMenClassifyingandDiagnosingbasedon...