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七巧板是我们祖先的一项卓越创造，被誉为“东方魔板”．如图是一个七巧板迷宫，它恰好拼成了一个正方形ABCD，其中E，P分别是AD，CD的中点，一只蚂蚁从点A处沿图中实线爬行到出口点P处．若AB＝2，则...
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七巧板是我们祖先创造的一种智力玩具它来源于勾股法如图1整幅七巧板由正方形ABCD分割成七小块其中五
七巧板是我们祖先的一项卓越创造用它可以拼出多种图形请你用七巧板中标号为①②③的三块板如图1经过平移旋
七巧板被西方人称为东方魔板．下面的两幅图是由同一副七巧板拼成的．已知七巧板拼成的正方形的边长为4则
七巧板是我们祖先的一项卓越创造被誉为东方魔板小明利用七巧板如图1所示拼成了一个长方形如图2所示则该
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七巧板是我们祖先的一项卓越创造被誉为东方魔板．如图是一个七巧板迷宫它恰好拼成了一个正方形ABCD其
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七巧板是我们祖先的一项创造被誉为东方魔板它是由五块等腰直角三角形两块全等的小三角形一块中三角形和两
七巧板是我们祖先的一项卓越创造被西方人誉为东方魔板．下面的两幅图正方形如图1风车型如图2都是由同一
七巧板是我国祖先的一项卓越创造它是由七块不同形状和大小珠木拼成图形的一种游戏右图是由七巧板拼成的两
图（1）是轴对称图形
图（2）是轴对称图形
图（1）是中心对称图形
图（2）是中心对称图形
七巧板是我们祖先的一项卓越创造被西方人誉为东方魔板．已知如图1所示的正方形和如图2所示的风车型都是
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七巧板是我们祖先的一项卓越创造被誉为东方魔板如图是一副七巧板若已知其中一块平行四边形PHQD的面积
七巧板是我们祖先的一项创造被誉为东方魔板它是由五块等腰直角三角形两块全等的小三角形一块中三角形和两
七巧板是我们祖先的一项卓越创造被誉为东方魔板小明利用七巧板如图1所示中各板块的边长之间的关系拼成一
七巧板是我们祖先的一项卓越创造用它可以拼出多种图形请你用七巧板中标号为①②③的三块板如图1经过平移
七巧板是我国祖先的一项卓越创造被誉为东方魔板．由边长为4的正方形ABCD可以制作一副如图1所示的七
七巧板是我国祖先的一项卓越创造．下列四幅图中有三幅是小明用如图所示的七巧板拼成的则不是小明拼成的那
七巧板是我们祖先的一项卓越创造被誉为东方魔板．如图是一个七巧板迷宫它恰好拼成了一个正方形ABCD其
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七巧板是我们祖先的一项创造被誉为东方魔板它是由五块等腰直角三角形两块全等的小三角形一块中三角形和两
七巧板是我们祖先的一项创造被誉为东方魔板如图是一副七巧板若已知S△BPC=1请你根据七巧板制作过程
七巧板被西方人称为东方魔板.下面的两幅图是由同一副七巧板拼成的.已知七巧板拼成的正方形如图a的边长为
七巧板是我们祖先的一项卓越创造被誉为东方魔板小明利用七巧板如图1所示中各板块的边长之间的关系拼成一个
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1分Ithinkit'sreallyhardworkformetofinishthejobintwentyminutes. A.a B.an C.the D.不填
5分Therearealotofschoolrulesaroundtheworld.ForexampleinAustraliaCanadaJapanandtheUnitedStatesstudentshavetowearuniformsandtheyarenotallowedtowearearrings. SomeschoolsinJapanandothercountrieshaverulesabouthair.Forexamplestudentsarenotallowedtochangethecoloroftheirhair.IntheUnitedStatesboyscannothavetheirhairgrowlong. ForsafetyatsomeUSschoolsstudentsmusthaveapairofindoorshoesatschooleveryday.Thismakessurestudentswon'tfalloveronthewetfloorsandkeepstheschoolsclean. GumchewingisnotallowedinmanyUSschoolbuildingsasitisdifficulttocleanup.Andifstudentschewguminclasstheymaynotpaymuchattentiontotheirstudies. Inmostforeigncountriesschoolstudentsareallowedtoworkpart﹣time.ButdifferentlyJapaneseschoolstudentsarenotallowedtoworkpart﹣timeorchangethecoloroftheirhair. 41.Whichcountriesshouldstudentsnotbeallowedtowearearringsin A.EnglandandJapan. B.AustraliaandJapan. C.CanadaandChina D.TheUSAandFrance. 42.ArestudentsallowedtochangethecoloroftheirhairinJapan A.Yestheyaren't. B.Notheyare. C.Yestheyare. D.Notheyaren't 43.WhymuststudentshaveapairofindoorshoesatschooleverydayatsomeUSschools A.Thismakesstudentsexercisemoreeasily. B.Thismakesstudentswon'tfalloveronthewetfloors. C.Thiskeepstheschoolsclean. D.Thiskeepstheschoolscleanandmakesstudentssafe. 44.Whatmayhappenifstudentschewguminclass A.Itisdifficulttocleanup. B.Studentswillfalloverintheclassroom. C.Studentsmaynotpaymuchattentiontotheirstudies. D.Theteacherswillbeveryangry. 45.Whatshouldn'tthestudentsbeallowedtodoinJapan A.Theyaren'tallowedtochewgum. B.Theyaren'tallowedtowearuniforms. C.Theyarenotallowedtoworkpart﹣timeorchangethecoloroftheirhair. D.Theyarenotallowedtoeatintheclassroom.
向盛有氯化亚铁和氯化铜混合溶液的烧杯中加入一定量的锌粉充分反应后得到固体M和溶液N．下列叙述错误的是
1分﹣﹣﹣Thanksforaskingmeyourparty. ﹣﹣﹣. A.Nevermind B.Don'tsayso C.Mypleasure D.Yesplease
10分在下面的空白处填入适当的话语话语可以是句子短语或词 ABobwhatareyoudoingB61.Theletterisaboutbadhabits. AWhatdoyoumean BIseesomepeoplethrowlitteraround.Andsomeoftenwastewater.Youknowwaterisveryimportanttous.AYouareright.62 BTotheTVstation.Ihopetheycancallonpeopletoprotectourenvironment AThenwhatshouldwedotoprotectourenvironment BI'dliketogotothePeople'sParkwithmyfriendsthisSaturday.63 AYesI'mfree.64BWe'regoingtocollectrubbishthere. AGoodidea!I'dliketojoinyou.65 BWe'llmeetat8o'clockatthegateofthepark.Seeyouthen!ASeeyou. 61. 62. 63. 64. 65.
不同温度下碳酸钠和碳酸氢钠的溶解度如表所示 1碳酸钠碳酸氢钠俗称小苏打请在选择的物质下面划线． 2服用碳酸氢钠治疗胃酸过多时胃液的pH填“增大”“减小”或“不变”发生反应的化学方程式是． 3为区分碳酸钠和碳酸氢钠两种白色固体．在20℃时各盛有50mL水的甲乙两烧杯中分别加入等质量的碳酸钠和碳酸氢钠固体充分溶解后现象如图所示．乙烧杯中加入的物质是填化学式加入的质量m的范围为．
现有下列四组物质①乙炔C2H2和苯C6H6②乳酸C3H6O3和果糖C6H12O6③丁烷C4H10和乙醚C4H10O④甲苯C7H8和甘油C3H8O3．当总质量一定时各组中的两种物质无论按何种质量比混合完全燃烧生成水的质量均相同．符合该条件的共有
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科学家用单个分子制成的“纳米车”能在人工操纵下运输药物分子到病源处释放杀死癌细胞．下列叙述错误的是
2分珍爱自己远离毒品.Becareofourselvesanddrugs.
1分Mr.Kingdidn'tknowyesterdayevening. A.whendoeshissoncomehome B.whendidhissoncomehome C.whenhissoncomeshome D.whenhissoncamehome
投放废旧电池的垃圾收集箱上应贴有的标志是
1分Themeetingisveryimportant.Webelate. A.needn't B.can't C.maynot D.mustn't
逻辑推理是化学学习常用的思维方法．下列推理正确的是
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1分youhurryupyou'llbelateforschool A.unless B.as C.if D.until
以化合价为纵坐标以物质的类别为横坐标所绘制的图象叫价类图如图为氮的价类图请分析该图后填写 1写出A点对应物质的化学式找出与图中的点对应物质不相符的化学式． 2在纯净物中根据可以把他们分成单质和化合物． 3写出由BC点对应的两种物质反应的化学方程式．
2分我们都坚信钓鱼岛属于中国.WeallbelievethatDiaoyuislandChina.
电视节目荒野求生中的生命吸管如图所示是一种将污水净化为饮用水的吸管装置可以除去99.3%的细菌和病毒但难以除去汞等金属离子．回答下列问题 1汞等金属离子危害人体健康的原因是． 2生命吸管“能”或“不能”使硬水软化．家庭中使硬水软化一般采取方法． 3吸管中活性炭主要用来除去．碘主要起到杀菌消毒作用生活中消毒还可采用84消毒液有效成分是次氯酸钠NaClO杀菌原理是与空气中的二氧化碳和水反应生成碳酸氢钠和次氯酸HClO试写出反应方程式．
1分Theriversmellsterrible.Peopledirtythingsintoit. A.muststoptothrow B.muststopfromthrowing C.mustbestoppedtothrow D.mustbestoppedfromthrowing
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5分WhatareyougoingtodoifyouareinaburninghouseHowwillyouescapeDoyouknowhowtosaveyourselfPleasereadthefollowingpassage. Escapingafireisaseriousmatter.Knowingwhattododuringafirecansaveyourself.Itisimportanttoknowthewaysyoucanuseandtoshowthemtoeveryoneinthefamilysuchasstairways楼梯andfireescapesbutnotlifts. Fromthelowerfloorsofthebuildingsescapingthroughwindowsispossiblelearnthebestwayofleavingthroughwindowswiththeleastchanceofseriousinjury伤害. Thesecondfloorwindowisusuallynotveryhighfromtheground.Anaverage普通的personhangingbythefinger﹣tips手指尖willhaveadropofaboutsixfeettotheground.Itisabouttheheightofanaverageman.Ofcourseitissafertojumpashortwaythantostayinaburningbuilding. Windowsarealsousefulwhenyouarewaitingforhelp.Besuretokeepthedoorclosed.Orsmokeandfiremaybedrawn向某方向移动intotheroom.Keepyourheadlowatthewindowtobesureyougetfreshairratherthansmokethatmayhaveleaked泄露intotheroom. Onasecondorthirdfloorthebestwindowsforescapearethosewhichopenontoaroof屋顶.Fromtheroofapersoncandroptothegroundmoresafely.Droppingontocement水泥mightendininjury.Bushesandgrasscanhelptobreakafall. 51.Itisimportantto. A.knowthewaystoescapeafire B.putoutafireinaburninghouse C.jumpoutofaburninghouse D.keepthedoorclosed 52.Itispossibletoescapethroughthewindows.. A.ifyouarestrongenough B.iftherearesomebushesontheground C.ifyouliveonalowerfloor D.ifyouhavealongrope 53.Whichofthefollowingwaysofescapingisnotright. A.Youcanescapethroughstairways B.usealifttocomedownatonce C.Escapethroughthewindowswhichopenontoaroof D.Youcanchoosefineescapes 54.Keepyourheadlowatthewindowsothatifthebuildingisonfire A.youcangetfreshair B.youcancallforhelp C.youcaneasilyjumpoff D.youcanbeseenfirst 55.Thebesttitleforthepassageis. A.Escapingthroughthewindows B.SaveYourselffromABurningHouse C.Knowledgeonfire D.WaitingforHelp.
1分﹣Canyouguessthenewschoolbagyesterday ﹣SorryI'venoidea. A.howmuchdidhepayfor B.howmuchhespent C.howmuchhepaidfor D.howmuchdidhespend
在一般条件下下列物质间的转化不能一步实现的是
判断下列大小或强弱关系并用“＜“＞”或“＝”填空． 1溶解度40℃的氢氧化钙20℃的氢氧化钙 2热稳定性碳酸钙碳酸氢铵 3热值氢气甲烷 4pHω＝10%的氯化钠溶液ω＝3%的苛性钠溶液．
1分Whereyou A.havebeento B.havegoneto C.havebeen D.havegone
15分WhenyouwereyoungwhorodeyouaroundonthebackofhisbikeWho21soccerandflewkites22withyouintheparkWhohelpedyouwithyourfirstdifficultmathproblemWhotaughtyouthedifferencesbetween23Yourdad.Nowitisyourturntodosomethingforhim.ThisSundayJune16itisFather'sDay.Sowhynotdo24specialtothankyourdadforallhisencouragementandsupport支持 TheideaofFather'sDaycame25anAmericanladycalledSonoraSmartDoddin1909.Shewantedan26daytohonorherfather.Heraisedsixchildrenbyhimself27hiswifediedduringthebirthoftheirsixthchild.Doddthoughtthereneededtobeadaytohonorhercourageous勇敢的selflessandlovingdad.HerfatherwasbornonJune1928shechosetoholdthefirstFather'sDaycelebrationonhisbirthdayin1910.In1924USPresidentCalvinCoolidgelikedtheideaofanationalFather'sDay.Finallyin1966thethirdSundayinJunewasdeclared宣布Father'sDay. Therearemanywaystoshowyourloveandthanks. Sendhimagreetingcard.Usuallyfathersprefercardsthatarenot29emo﹣ tional使人动感情的.Thereforeperhapschooseonethat30himlaugh. Asmallpresentsuchasaphotoofyourfamily31aspecialwallet32makehimfeellikeaking. Sendhim33andtheredroseisthe34giftintheofficeduringFather'sDay. Ifhehasa35coverhisdesktop桌面withwordslikeIloveyoudad! 21.A.played B.bought C.sold D.gave 22.A.quietly B.sadly C.happily D.loudly 23.A.oldandyoung B.bigandsmall C.rightandwrong D.longandshort 24.A.nothing B.something C.everything D.anything 25.A.in B.out C.over D.from 26.A.easy B.unusual C.strange D.attractive 27.A.when B.until C.after D.before 28.A.so B.because C.until D.if 29.A.much B.also C.many D.too 30.A.willmake B.ismaking C.hasmade D.ismade 31.A.but B.or C.yet D.and 32.A.should B.can C.must D.need 33.A.clothes B.books C.flowers D.computers 34.A.morepopular B.muchpopular C.mostpopular D.popularest 35.A.watch B.computer C.car D.bike.
某工厂产生的烧渣主要含FeOFe2O3还有一定量的SiO2可用于制备七水合硫酸亚铁晶体FeSO4•7H2O其工艺流程如图． 查阅资料SiO2不溶于水也不与稀硫酸反应． 1“浸取”步骤中FeOFe2O3和稀硫酸发生反应的化学方程式分别为 FeO+H2SO4═Fe3O4+H2O． 2过滤用到的玻璃仪器有． 3“还原”步骤是将Fe转化为Fe2+试剂X可用SO2或Fe． ①若试剂X是SO2转化原理为SO2+FeSO43+2H2O＝2FeSO4+2Y则Y的化学式是． ②若试剂X是Fe转化原理的化学方程式为． 测得“还原”后溶液的pH明显增大其原因是．
1分Theoldshouldwell. A.betakecareof B.lookafter C.belookedafter D.betakingcareof
聚乳酸[C3H4O2m]是一种可降解塑料降解生成CO2和H2O．下列叙述错误的是
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