简介:《中学数学教学参考》(中旬)2012年第9期巩淼海老师的《探寻一道错题的错误根源》一文,探索证明了“直角三角形的两直角边的和不大于斜边的√2倍”,文中提供了两种证法,在此基础上,笔者对此问题作了进一步探究.
简介:Amanwalkedintoarestaurant.Therestaurantadvertisedithadthe1menuintheworld.Themanagerwasveryproudofbeingabletoprovideanydish,nomatterhow2itwas.Atthebottomofthe3,therewasanoticethatsaid,“Ifyoudonotseethedishyouneedonthismenu,pleasetellusandwewilladdittothemenurightaway.”Theman4themenuanddecidedtomakesureifitwastrue.Hewouldorder5thatwasveryunusual.Whenawaitercameuptotakehisorder,hesaid,“Yousayyoucanserveanydish,evenifit’snotonyourlongestmenuintheworld.”“Thatis6,sir.Weareabletomeeteveryone’srequirements.”“Well,”themansaid,“bringmeasandwichwithtwoelephantears.Indian,notAfrican.”Thewaiterwrotedowninhispaper:TwoIndianelephantearsontoast(烤面包片).
简介:我一直认为,我的生活很悲哀,暗淡无光。我游走在仇恨边缘,幸福早已离我而去。我开始相信:即使我可以看见幸福,也抵达不了幸福的国度。从父母决定分道扬镳的那
简介:重点词汇1.cheerv.欢呼;喝彩cheerup(使)变得更高兴;振奋起来Iwrotethatsongjusttocheermyselfup.我写那首歌是给我自己打气的。拓展cheern.欢呼声;喝彩声2.volunteerv.义务做;自愿做n.志愿者volunteertodosth自愿做某事Jackvolunteeredtocarrywater.杰克自愿去运水。Ineedonevolunteer.我需要一名志愿者。3.noticen.通知;通告;注意v.注意到;意识到