简介:第一章力1.A.2.C.3.B.4.B.5.C.6.B.7.D.8.B、C、D.9.A、D.10.B、D.11.A、D.12,A、B、D.13.A、C、D.14.0~15N.15.28N;25N.16.10N;与大小为F3.的力同向.17.F/2sin(θ/2).18.1021/2N≈14.14N.19.2031/3N,1031/3N.20.50(2-31/3)N≈13.4N.第二章物体的运动1.B.2.A.3.A.4.B.5.D.6.B.7.D.8.D.9.C、D.10.C、D11.B、C.12.B、C、D.13.A、B、C.14.A、B、C.15.18.16.10m/s.17.4m/s2.18.25km/h.19.5m/s.20.-0.4m/s2m/s.21.-500m/s2.2m/s2;相反.23.32.5m.24.45m.25.1m/s;2.5m/s2.26.400m;20m/s;40s.(第一、二章由江苏省姜堰中学李环生老师编)第三章牛顿运动定律1.D.2.D.3.C.4.A.5.C.6.C.7.C.8.C.9.C.10.B、C.11.A、D.12.B、D.13.B、D.14.B、D.15.0,变加速,16.1.5m/s2,4.5m/s.17.0.4.18.0.5m/s2,6×103N.19.120,向下匀减速或向上勾加速,5m/s2.20.2,0.8m/s2.21.(1)10kg,(2)8m/s(3)260kg.22.(1)a=(2F)/(3m).(2)s=(Ft2)/(3m).23.S=1Om,v=2m/s.(本章及力学综合由南京师大附中周久(?)老师编)
简介:<正>1.B2.B3.B4.D5.C6.D7.B8.B9.D10.D11.D12.C13.B14.B15.C16.C17.B18.B19.C20.C21.A22.B23.A24.B25D26.B27.B28.B29.B30.B31.D32.B33.B34.A35.C36.D37.B38.B39.B40.CⅡ.41.ThepopulationofBritainismadeupmainlyoftheEnglish,theScottish,theWelsh,theIrish,andtheNorthernIrish.42.ItconsistsoftheSovereign,theHouseofLordsandtheHouseofCommons.43.ThestatesecondaryschoolsinBritainincludecomprehensiveschools,secondarymodernschools,andgrammarschools,whiletheprivatelyfundedschoolsarethepublicschools.