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聚酰亚胺是重要的特种工程材料，广泛应用在航空、纳米、激光等领域．某聚酰亚胺的合成路线如图（部分反应条件略去）： 已知： ①机物A的质谱与核磁共振氢谱图如下： ②2RCOOH+H2O ③ ...
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高三下学期化学《》真题及答案
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求阴影部分面积．
一个由相同的小正方体摆成的几何体从正面和左面看到的形状都是从上面看到的形状是．摆这个几何体用了个小正方体．
有7个好朋友见面每2人握一次手一共要握14次．判断对错
xy都是自然数如果+＝则x+y＝．
长方形的长16厘米宽12厘米它的周长是厘米面积是平方厘米．
鞋的尺码通常用“码”或“厘米”做单位它们之间的换算关系是b＝2a﹣10b表示码数a表示厘米数．小明今年的脚长为23厘米他要穿码的鞋等小明要穿40码鞋的时候他的脚长厘米．
用你喜欢的方法解答． +×27 ×0.32+0.68÷ ÷〔×1﹣〕 32×25×1.25．
WhenIwasstrollingintheparkonedayIpassedsomechildrensellinghotchocolate.OnegirlaskedWouldyouliketohelpsupportourpark?It'sonly50rentsacup.OfcourseIcouldn'thelpbeingextraordinarily1thatkidsshowedgreatinterestin2theircommunity.Theywerehavinggreat3pouringhoichocolateandfeelingproudthattheywerehelpingalocalcause.Itthatthey4graspedabasicideaabouthelpingothersItfeels5. Teachingourchildrentohelpothersbenefitsthemagreatdeal.6bringsthempeaceofmind.Servingthoseinneedalsohelpschildrenlearntomakea7﹣thattheyhavethe8tomakeapositiveimpact.This9asenseofcontrolhelpingthemfeellessfrightened.Italsoreassuresthemthathelpwouldbe10iftheywereeverindanger. Anotherimportant11isthatwearealldependentoneachother.Whenchildrenserveotherstheylearnto12someoneelse'sgreaterneedandto13otherpeople. Therearemanyother14ofmakingcharityapartofyourfamily'slife.You'llmeetnewfriendsanddeveloprelationships.Runningabakesalewillgiveyourkidsachancetopractice15suchasfundraisingmoneymanagementandteamwork.Self﹣explorationanddiscoverywill16throughtheirchoiceofactivities. Ifachildcanbecomeacheerfulcharitablegiverheorshemusttrydifferentvolunteerefforts.Whenyouseethemenjoyingthe17ofthemencouragethemto18. OnmyownexperienceIcansaydevelopingthegood19ofcharitablegivingwillbecome20toyourbestfamilymemoriesandcelebrations. 1A.worried B.impressed C.doubtful D.grateful 2A.organizing B.cleaning C.improving D.controlling 3A.difficulty B.success C.advantage D.fun 4A.already B.seldom C.never D.often 5A.boring B.strange C.great D.relaxing 6A.Teaching B.Giving C.Thinking D.Learning 7A.choice B.promise C.mistake D.difference 8A.ability B.right C.freedom D.time 9A.promotes B.reduces C.reflects D.protects 10A.impossible B.flexible C.available D.reasonable 11A.example B.lesson C.question D.secret 12A.takeover B.searchfor C.relateto D.giveup 13A.believein B.lookfor C.turnto D.careabout 14A.disadvantages B.benefits C.contributions D.methods 15A.activities B.moves C.skills D.behaviors 16A.stay B.miss C.come D.get 17A.equality B.fruit C.effect D.independence 18A.continue B.explain C.observe D.communicate 19A.aspect B.meaning C.habit D.way 20A.hard B.central C.obvious D.Serious
下面题中的两个关联的量 小红从家到学校已走的路程和剩下的路程．
二十亿八千万写作
在一条线段上共有9个点则这9个点可以构成38条线段．判断对错
求出下图中的阴影部分的周长和面积． 阴影部分的周长 阴影部分的面积
拉萨市平均每天的日照时间为8.22小时．先估算一下再计算拉萨全年的日照时间大约是多少得数凑整到个位一年按365天计算
计算． 1×8× 2++×36 3×+× 487×
所有的自然数不是质数就是合数．．判断对错
几个完全一样的正方体小木块摆放在桌面上从正面右面上面看都是桌面上至少摆放了个小木块．
已知平行四边形的面积是20.4cm2图中涂色部分的面积是
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如果三角形的面积是24平方厘米则同它等底等高的平行四边形的面积是平方厘米．
一个圆锥的底面半径是4厘米高是6厘米．和它等底等高的圆柱的体积是立方厘米．
某辆旅游汽车在平原地区行驶了3小时平均每小时行驶60km后来又在山谷地区行驶了相同的路程用了5小时最后到达山顶．求这辆旅游汽车从平原到山顶的平均速度．
甲乙两数比是45甲是乙的%甲比乙少%乙比甲多%．
一个底面直径和高都是3分米的圆锥它的体积是立方分米一个与它等底等高的圆柱的体积比它大立方分米．
IsanyeconomistsodullastocriticizeChristmas?Atfirstglancetheholidayseasoninwesterneconomiesseemsatreatforthoseconcernedwithsuchvagaries奇想asGDPgrowth.AfteralleveryoneisspendinginAmericaretailersmake25%oftheiryearlysalesand60%oftheirprofitsbetweenThanksgivingandChristmas.Evensoeconomistsfindsomethingtoworryaboutinthenatureofthepurchasesbeingmade. Muchoftheholidayspendingisongiftsforothers.Atthesimplestlevelgivinggiftsinvolvesthegiverthinkingofsomethingthattherecipientwouldlike﹣hetriestoguessherpreferencesaseconomistssay﹣andthenbuyingthegiftanddeliveringit.Yetthisguessingofpreferencesisnoteasyindeeditisoftendonebadly.Everyyeartiesgounwornandbooksunread.Andevenifagiftisenjoyeditmaynotbewhattherecipientwouldhaveboughtiftheyhadspentthemoneythemselves. Interestedinthismismatchbetweenwantsandgiftsin1993JoelWaldfogelthenaneconomistatYaleUniversitysoughttoestimatethedifferenceindollarterms.Inaresearchheaskedstudentstwoquestionsattheendofaholidayseasonfirstestimatethetotalamountpaidbythegiversforalltheholidaygiftsyoureceivedsecondapartfromthesentimentalvalueoftheitemsifyoudidnothavethemhowmuchwouldyoubewillingtopaytogetthem?Hisresultsweregloomyonaverageagiftwasvaluedbytherecipientwellbelowthepricepaidbythegiver. Inadditionrecipientsmaynotknowtheirownpreferencesverywell.Someofthebestgiftsafterallareunexpecteditemsthatyouwouldneverhavethoughtofbuyingbutwhichturnouttobeespeciallywellpicked.Andpreferencecanchange.SobygivingajazzCDforexamplethegivermaybeencouragingtherecipienttoenjoysomethingthatwasignoredbefore.Thisadesiretobuildskillsispossiblythehopeheldbymanyparentswhoignoretheirchildren'sdesiresforvideogamesandbuythembooksinstead. Finallythereareitemsthatarecipientwouldliketoreceivebutnotpurchase.Ifsomeoneelsebuysthemhowevertheycanbeenjoyedguilt﹣free.Thismightexplainthehighvolumeofchocolatethatchangesovertheholidays.Thusthelessonforgift﹣giversisthatyoushouldtryhardtoguessthepreferenceofeachpersononyourlistandthenchooseagiftthatwillhaveahighsentimentalvalue. 32.ThewordsentimentalinParagraph3iscloseto. A.intelligent B.emotional C.social D.practical 33.AccordingtothetextwhichofthefollowingstatementsisTRUE? A.Priceisnothingbutthefactorwhenyougivegifts. B.Chocolateswillbeblamedwhenpeoplereceivethemasgifts. C.Thereceiversoftenoverestimatethevaluesofgifts. D.Wantsdonotalwayscorrespondtoneedsingift﹣giving. 34.Whichofthefollowingstatementscanbeinferredfromthetext? A.Thegift﹣givertriestoneglecttheactualneedsofthereceiver. B.Thebestgiftsarewellpickedbythegivers. C.Ingift﹣givingguessingpreferenceisoftenafailuresoit'sthethoughtthatcounts. D.Youhavetotakemoneyintoconsiderationwhengivingagift. 35.Thetextismostlikelytakenfroma. A.users'handbook B.medicaljournal C.travelmagazine D.consumer﹣relatedreport.
TheLondonEye4DFilmExperiencestartedinAugustandisincludedintheLondonEyeticketprice.Itisafantastic4DfilmtoentertainyoubeforeyourtripontheLondonEye.The4Deffectsaregreat. NoExtraCosttoYou That'srightyoubuyyourticketfortheLondonEyeand4Dcinemaexperience.MerlinEntertainmentstheLondonEyeownersspent5millioncreatingthefilmandbuildingthe4DcinemaandwantedtoimprovethevalueformoneyoftheLondonEye. WhattoExpect The4DCinemaentranceisinthetickethall.Soafterbuyingyourticketgostraighttoitwhereyou'llbegivenapairofglasses.About160visitorswillpassthroughthe4Dcinemaevery8minutessodon'tworryaboutwaitingtime.Peopleinthebrightpinkcinemaareallstandingonfourlevels.Thetoplevelisdesignedforwheelchairs. LondonEye4DFilm Putonyourglassesandenjoyyourself.ThestoryisaboutalittlegirlvisitingLondonwithherfatherandshewantstobehighertogetabetterviewsoshecomestotheLondonEye.Itdiffersfromwatchingthe3Dfilmforallyoursensesareinvolved.Whenitsnowsonscreenyoufeelitsnowsinthecinema.Andwhenyouwatchthefireworksyoucanreallysmellthem. Forashortfilmlessthanfourminutesbeforethemainattractionyouthinkyou'vecomeforyouaregoingtolovethisfreeextra.Istoodtherewithmymouthwideopenattheendasmanyothersdid.It'sfantastic!TheeffectsaretheHollywoodstandardasnoexpenseisspared.IwasluckyenoughtotrythefilmthreetimesonthefirstdayandIstillwanttogobackagain. 25.Whatdoestheauthormainlytellusinthispassage? A.Hemainlyintroducesthe4DfilmofMerlinEntertainments. B.HemainlyintroducestheLondonEyeentertainmentcenter. C.Hemainlytellsushisexperienceswhilecreatingthe4Dfilm. D.Hemainlyintroducestoushowtotakepartinthe4Dfilm. 26.WhydidtheMerlinEntertainmentsbuildthe4Dfilmcinema? A.BecauseitwantedtoattractmorevisitorstoLondon. B.BecauseitcouldearnmoremoneyfromthepublicintheUK. C.Becauseitcouldprovidemoreentertainmentsforvisitors. D.BecauseitwantedtoincreasethevalueoftheLondonEye. 27.Wherecouldpeoplegetintothe4Dfilmcinema? A.IntheHollywood. B.Inthetickethall. C.UndertheLondonEye. D.Intheticketcenter. 28.Whileseeinga4Dfilmpeoplewillfeel. A.greatlyfrightened B.muchworried C.sweetsmell D.asiftheywereonthescene.
李爷爷家去年共收12000千克玉米今年换了新品种产量增加两成今年一共收千克玉米．
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下面画一横线并在该词下面写出修改后的词. 注意1每处错误及其修改均仅限一词 2只允许修改10处多者从第11处起不计分. Nooneliveswithoutadream.Whetherthepathissmoothlyortoughweareonthepathtoachievingit.Asasenior3studentIhavethesamedreamlikemyclassmatesthatIcanbeadmittedtoanidealuniversity.InthepastthreeyearsIhavedoneeverythingIcanequipmyselfwiththatIhavelearntfrommyteachers.NotonlyhaveIenjoythepleasureofstudybutalsoIhavegotclosertomydream.Anxietyandpressurediscouragehimnowandthen.ThereforewiththeencouragementofmyteachersandclassmatesIthinkI'llmakeoutit. I'msurethatthereisstillalongwaytogotoachievemydream.NomatterhowchallengeditisI'llmakeitcometrue.AstheproverbsaysWheretherehasawillthere'saway.
两个不相同的奇数之和一定是合数．判断对错
平行四边形的面积一定它的底和高
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