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共找到 2317 与MR 相关的结果，耗时1 ms
直线l经过点A(2,1),B(1,㎡)(mR),那么直线l的倾斜角的取值范围是答案是[0,45°]并上（90°,180°）求步骤
数学
关于地心引力分力问题地球表面物体受到地心引力F=GMm/r²设物体在赤道上则GMm/r²=mg+mrω²mrω²又可以=mr（2π/T）²mrω²算出来约等于0.034N不过用mr（2π/T）²但算出来结
物理
?
Ourteacher,Mr.Zhang,hastaughtEnglishtenyearsago.A．sinceB．forC．inD．of
英语
Mr.SmithisourEngilshteacher.Heisalsoourfriend.(合并成一句)Mr.Smithisourteacherourfriend.
英语
几道英语题.1、Ourteachertellsusthatice,snowandsteamare(form)ofwater2、Don'tworry.Mr.wang.ihaveagood(feel)thatwemustbethewinnerinthegame
英语
he winner in t
Mr.Wangisourteacher.Heteacheswell.[]A．weB．ourC．us
英语
Mr.SmithisourteaMr.Smithisourteacher.HeEnglishinourschoolformorethansixyears.[]A.teachesB.taughtC.willteachD.hastaught
英语
will teach D.h
Mr.Smithisourteacher.HeEnglishinourschoolformorethansixyears.[]A.teachesB.taughtC.willteachD.hastaught
英语
. has taught
Atschoolmanythingshappentous．Wemayfeelexcitedwhenwesucceedinaschoolplay．Wemayfeelsorryifweloseanimportant（76）g．Wewanttokeepthememory（记
英语
___．We want to
1.Everyone()tohaveatleasteight()sleepatnight.A.needs;hour'sB.need;hours'c.needed;hour'sD.needs;houes'2.Mr.Wangisverystrict()hisson.And
英语
rict ( )his so
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