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人的一生中，睡眠大约占到了三分之一的时间，睡眠能够促进生长发育、恢复体力和增强抵抗力．研究发现，睡眠主要依靠脑部多个脑区的胞外腺苷水平来调节． （1）腺苷由1分子的腺嘌呤和1分子的 组成．神经...
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高三下学期生物《》真题及答案
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据分析淤积在黄河下游的泥沙中来自1.88万平方公里粗泥沙集中来源区的泥沙约占三分之一其中粒径大于0.
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某学校高一高二高三共有学生3500人其中高三学生数是高一学生数的两倍高二学生数比高一学生数多300人现在按的抽样比用分层抽样的方法抽取样本则应抽取高一学生数为
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InChinawecanseeeverywherethatsomepedestrianstendtoruntheredlightingroupswhencrossingthestreet.ThisphenomenonhasattractedwidespreadconcerninChina.RecentlyBeijinggovernmentannouncedthatpeoplewhodonotwaitforthegreenlighttocrosstheroadwillreceiveafineof10yuan.What'smoreusingthediagonaltocrosstheroadisalsoagainsttherules.WalkersshouldwalkinanLshape. BesidesBeijingmanyplaceshavealsotakenstepstostopChinesestyleroadcrossing.ProvincessuchasSichuanShanxiandZhejianghavealreadystartedtofinejaywalkers5to50yuansincelastyear.Thispunishmentcancallonpeopletorealizetheimportanceoftrafficsafety.Howevermanypeoplecomplainthattheredlightslasttoolong.EveryoneshouldfollowtherulesorthecountrywillloseitsordersaidPeopleDaily. Somecitieshavealsopaidattentiontotheproblem.ForexampleBeijinggovernmentsaiditshouldnotonlypunishthesejaywalkersbutalsoimproveroadsafetyfacilitiessuchasproperlyfixingtrafficlightsandbuildingoverpasses. Anyhowsafetymustcomefirst. 【写作内容】 1.以约30个词概括上文的主要内容; 2.以约120个词发表你对中国式过马路的看法内容包括: 1指出由此造成的影响; 2分析出现这种现象的原因; 3针对这个现象提出建议. 【写作要求】 1.作文中可以使用亲身经历或虚构的故事也可以参照阅读材料的内容但不得直接引用原文中的句子. 2.作文中不能出现真实姓名和学校名称. 【评分标准】 概括准确语言规范内容合适语篇连贯. .
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A.IAmaPencil SamSwope'sjobwasteachingwritingtothird﹣gradersinNewYorkCity.Hisstudentswerefrom21countriesspeaking11languageswithdifferentbackgrounds.Buttherewereafewthingstheyhadincommon.Familytroubles.Moneystruggles.Andpoetry.Everysinglestudentwiththehelpofthiscreativeteachercameforthwithawesomewriting. B.BetweenaRockandaHardPlace AronRalston28wenthikinginaremoteUtahcanyonwithouttellinganyone. Anunexpectedcatastrophestruck.WithoutenoughsuppliesRalstonknewhissituationwasfullofdanger.Afterfivedayshewasinafightagainstdeath.Thatwaswhenhecarriedoutacourageousplan.Hisamazingsurvivalstoryrestsataplaceamongtheclassicsofthegenre. C.OurBrother'sKeeper AuthorJedwinSmithspent30yearstryingtoholdbackallmemoriesofhisbrotherJeffwhowaskilledinVietnam.ButinOurBrother'sKeeperhetellswhathappenswhentheInternetbringshimintocontactwithseveralhisbrother'soldMarinefriendsincludingtheguywhoheldJeffinhisarmsashedied.Firstviae﹣mailandtheninpersonSmithgetstoknowthesemen. D.TheAllAmericans WithhisgraduationfromWestPointHenryRomaneksailedtowardOmahaBeachontheeveofD﹣day.ItwasJune1944andhewasabouttofacethebloodiestbattleofhislife.JustyesterdayitseemedhewasastandoutsoldierontheArmyteam.Nowhewasaleaderofyoungstersinbattlefightingforhiscountryandthefutureofthefreeworld. E.CopiesinSeconds Withthepushofabuttonanyonecanmakecopiesofalmostanything.InCopiesinSecondsDavidOwenshowedhowashyengineernamedChesterCarlsonperfectedhisxerographymachineandshoppeditarounduntilfinallyhookingupwiththeHaloidCorporation.ThatpartnershipledtotheXeroxcopierandchangedthefaceofworkforever. F.StateofGrace Backinthelate1950sandearly1960stheLynvetswasjustafoot﹣ballteaminasandyNewYorkCityneighborhood.Buttomostofitsmemberstheteamwastheironlyexperienceofahappyfamilytheironlychancetoriseabovebadeverydaycircumstancestheironlyshotatbeingheroes.Thefriendshipsthesemenformedsustainedthemthroughouttheirlives. 请阅读以下求书者的信息然后匹配他们所要寻找的书籍: 1.Kateisdoingresearchintohistory.RecentlyshebecomesinterestedinthehistoryaboutWorldWarII.Shenowwantstofindabookaboutthestoriesofthesoldiersatthattime. 2.Tomisateacherandinterestedinhikingandclimbingverymuch.Nowheislookingforabookaboutthehikingstoriestohelphiminhisfollowingoutdooractivities. 3.Jackisresearchingintoeducationinacollege.Heisespeciallyinterestedintheteachingmethods.Hewantstofindabookwhichcantellhimsomethingabouthowtoteachstudentsfromdifferentbackgrounds. 4.Johnisanexpertonmilitaryaffairs.HewantstofindsomematerialsaboutthesoldiersinVietnamWartocarryonhisnewresearch. 5.Markisstudyingscience.Nowadayshewantstoresearchintothehistoryoftechnologicaldevelopment.Hefirsthopestofindabookaboutthedevelopmentofthecopierswhichhavechangedourworldgreatly.
氢气是新型能源和重要化工原料． 已知①2COg+O2g＝2CO2g△H1 ②CH4g+2O2g＝CO2g+2H2Ol△H2 ③H2g+O2g＝H2Ol△H2 1科学家提出一种利用天然气制备氢气的方法CH4g+CO2g＝2COg+2H2g△H △H＝．这种方法的推广与使用不仅实现资源综合利用而且还能解决环境问题是． 2氨气是重要化工原料在国民经济中占重要地位． ①在恒温容积相等的恒容密闭容器中投入一定量氮气氢气发生如下可逆反应 N2g+3H2g═2NH3g△H＝﹣92.4kJ•mol﹣1 实验测得起始平衡时的有关数据如表所示 下列判断正确的是． A．N2的转化率Ⅱ＞I＞Ⅲ B．放出热量a＜b＜92.4n C．达到平衡时氨气的体积分数Ⅲ＞Ⅰ D．平衡常数Ⅲ＞Ⅱ＞Ⅰ ②在密闭恒容容器中投入一定量氮气和氢气混合气体中氨气体积分数和温度关系如图所示 曲线TJ段变化主要原因是JL段变化的主要原因是．氨气正反应速率T点L点填大于小于或等于． ③在2L密闭容器中充入一定量的氨气氨气的物质的量与反应时间关系如表所示 在该条件下前5分钟H2平均反应速率为． ④常温下在VmL的amol•L﹣1稀硫酸溶液中滴加bmol•L﹣1稀氨水VmL恰好使混合溶液呈中性．此时一水合氨的电离常数Kb＝用含ab代数式表示． 3氢气直接作燃料电池的理论输出电压为1.2V能量密度E＝ ＝32.2kW•h•kg﹣1列式计算．
玉米细胞中与籽粒种皮的颜色有关的两对等位基因B和bD和d位置如图所示基因B控制色素的形成．一般情况下当基因B存在时籽粒种皮有色否则就表现无色基因D会抑制基因B的表达使基因B不能控制合成色素籽粒种皮表现为无色． 1不考虑基因突变和交叉互换的情况下图中基因①为选填“D”“d”“B”或“b”I和Ⅱ是一对具有图中这种基因组成的玉米籽粒种皮的颜色为． 2现有一株纯种的籽粒有色玉米BBdd与一株纯种的籽粒无色玉米杂交若F1全为有色则亲代籽粒无色玉米的基因型为若不考虑交叉互换F1自交产生F2F2籽粒种皮颜色和比例为． 3研究发现当A基因存在时D基因会从染色体上断裂脱落下来从而解除其对基因B的抑制基因B得以表达籽粒种皮表现出色斑．若图中ⅠⅡ处a突变成A则与籽粒种皮颜色相关的基因型为AaBb该植株自交后代籽粒种皮表现型及比例是．
AyearagoAugustDaveFusslosthisjobdrivingatruckforasmallcompanyinwestMichigan.HiswifeGerriewasstillworkinginthelocalschoolcafeteriabutworkforDavewasscarceandthepriceofeverythingwasrising.TheFusseswereatriskofjoiningthemillionsofAmericanswhohavelosttheirhomesinrecentyears.ThenDaveandGerriereceivedatimelygift﹣7000alegacy遗产formtheirneighborsIshandArleneHatchwhodiedinanaccident.Itreallymadeadifferencewhenweweregoingunderfinancially.saysDave. ButtheFussesweren'ttheonlyfolksinAltoandtheneighboringtownofLowelltoreceiveunexpectedlegacyfromtheHatches.DoxensofotherfamiliesweretouchedbytheHatches'generosity.Insomecasesitwasafewthousanddollars;inotheritwasmorethan100000. ItsurprisednearlyeveryonethattheHatcheshadsomuchmoneymorethan3million﹣theywereamelderlycouplewholivedinanoldhouseonwhatwasleftofthefamilyfarm.ChildrenoftheGreatDepressionIshandArlenewereknownfortheirhabitofsavingTheythrivedown喜欢comparisonshoppingandwouldroutinelygofromstoretostorecheckingpricesbeforemakinganewpurchase. ThroughtheyearstheHatchespaidforlocalchildrentoattendsummercampwhentheirparentscouldn'taffordit.IshandArleneneveraskedyouneededanythingsaystheirfriendSandVanWeeldenThey'dseethingstheycoulddogomakeyouhappierandthey'lldothem. EvenmoreextraordinarywasthattheHatcheshadtheirfarmlanddistributed.ItwastheHatches'wishthattheirlegacy﹣alegacyofkindnessasmuchasoneofdollarsandcent﹣shouldenrichthewholecommunityandIshandArleneHatch'sstory. Neighborshelpingneighbors﹣﹣thatwasIshandArleneHatch'sstory. 1.AccordinggothetexttheFusses. A.wereemployedbyatruckcompany B.wereinfinancialdifficulty C.workedinaschoolcafeteria D.losttheirhome 2.WhichofthefollowingistrueoftheHatches? A.TheyhadtheirchildrenduringtheGreatDeoression B.Theyleftthefamilyfarmtoliveinanoldhouse C.Theygaveawaytheirpossessionstotheirneighbors D.Theyhelpedtheirneighborstofindjobs 3.WhywouldtheHatchesroutinelygofromstore? A.Theydecidedtoopenastore B.Theywantedtosavemoney C.Theycouldn'taffordexpensivethings D.Theywantedtobuygiftsforlocalkids 4.AccordingtoSandVanWeeldentheHatcheswere. A.understanding B.optimistic C.childlike D.curious 5.Whatcanwelearnfromthetext? A.ThecommunityofAltowaspoor B.Thesummercampwasattractivetotheparents C.SandyVanWeeldengotalegacyformtheHatches D.TheHatcheswouldliketheneighborstofollowtheirexample
用NA表示阿伏加德罗常数下列说法正确的是
海水中含有丰富的锂资源研究人员开发了一种只能让锂离子通过的特殊交换膜并运用电解实现从海水中提取高浓度的锂盐其工作原理如图所示｡下列说法不正确的是
已知函数fx＝x3+ax2+bx﹣a2﹣7a在x＝1处取得极大值10则的值为
LastSundaymytrainwasdelayedfortwohours.Ihadplentyoftimeto1.AfterbuyingsomenewspaperstoreadonthejourneyImademywaytothe2officetocollectmyheavysuitcaseIhadlefttherethreedaysbefore.Therewereonlyafewpeople3andItookoutmywallettofindthereceiptformycase.Thereceiptdidn'tseemtobewhereIhadleftit.I4thecontentsandrailwayticketsmoneyscrapsofpaperandphotosfelloutofit.ButnomatterhowhardIsearchedthe5wasnowheretobefound. WhenmyturncameIexplainedthesituation6totheassistant.Themanlookedatmeupanddownasiftosaythathehadheardthiskindofsadstorymanytimesandaskedmeto7thecase.Itoldhimthatitwasanoldbrownlooking8nodifferentfromthemanycasesIcouldseeontheshelves.Theassistantthengavemean9andtoldmetomakealistofthechiefcontentsofthecase.Iftheywere10hesaidIcouldtakethecaseaway.ItriedtorememberallthearticlesIhad11packedintothecaseinashorttimeandwrotethemdownastheycametome. AfterIhaddonethisIwentto12amongtheshelves.Therewerehundredsofcasesthere.Foronedreadfulmomentit13tomethatifsomeonehadpickedthereceiptuphecouldhaveeasilyclaimedthecasealready.Thishadn'thappened14forafteratimeIfoundthecaselyinginacorner.Afterexaminingthearticlesinsidetheassistantwas15andtoldmeIcouldtakethecaseaway. 1.A.waste B.spare C.arrange D.make 2.A.tourist B.luggage C.ticket D.head 3.A.standing B.crowding C.talking D.waiting 4.A.threw B.gathered C.checked D.emptied 5.A.newspaper B.receipt C.case D.shelf 6.A.easily B.excitedly C.gladly D.sorrowfully 7.A.describe B.draw C.examine D.show 8.A.object B.bag C.pocket D.wallet 9.A.address B.envelope C.message D.form 10.A.good B.wrong C.correct D.ready 11.A.carelessly B.suddenly C.hurriedly D.immediately 12.A.look B.watch C.find D.see 13.A.happened B.occurred C.appeared D.seemed 14.A.fortunately B.unluckily C.hopefully D.presently 15.A.disappointed B.surprised C.satisfied D.worried
下列关于细胞中能量代谢的叙述错误的是
史记中讲述了田忌与齐王赛马的故事．“田忌的上等马优于齐王的中等马劣于齐王的上等马田忌的中等马优于齐王的下等马劣于齐王的中等马田忌的下等马劣于齐王的下等马．”双方从各自的马匹中随机选一匹进行一场比赛则田忌的马获胜的概率为
Plantscan'tcommunicatebymovingormakingsoundsasmostanimalsdo.Insteadplantsproducevolatilecompoundschemicalsthateasilychassefromaliquidtoagas.Aflower'ssweetsmellforexamplecomesfromvolatilecompoundsthattheplantproducestoattractinsectssuchasbugsandbees. PlantscanalsodetectvolatilecompoundsproducedbyotherplantsAtreeunderattackbyhungryinsectsforinstancemaygiveoffvolatilecompoundsthatletothertreesknowabouttheattack.Inresponsetheothertreesmaysendoffchemicalstokeepthebugsaway﹣﹣﹣orevenchemicalsthatattractthebugs'naturalenemies. Nowscientistshavecreatedaquickwaytounderstandwhatplantsaresaying:achemicalsensor传感器calledanelectronicnose.Thee﹣nosecantellcompoundsthatcropplantsmakewhenthey'reattacked.Scientistssaythee﹣nosecouldhelpquicklydetectwhetherplantsarebeingeatenbyinsects.Buttodaytheonlywaytodetectsuchinsectsistovisuallyinspectindividualplants.Thisisachallengingtaskformanagersofgreenhousesenclosedgardensthatcanhousethousandsofplants. Theresearchteamworkedwithane﹣nosethatrecognizesvolatilecompounds.Insidethedevice13sensorschemicallyreactwithvolatilecompounds.Basedontheseinteractionsthee﹣nosegivesoffelectronicsignalsthatthescientistsanalyzeusingcomputersoftware. Totestthenosetheteampresenteditwithhealthyleavesfromcucumberpepperandtomatoplantsallcommongreenhousecrops.Thenthescientistscollectedsamplesofairarounddamagedleavesfromeachtypeofcrop.Theseplantshadbeenchangedbyinsectsorbyscientistswhomadeholesintheleaveswithaholepunch打孔器. Thee﹣noseitturnsoutcouldidentifyhealthycucumberpepperandtomatoplantsbasedonthevolatilecompoundstheyproduce.Itcouldalsoidentifytomatoleavesthathadbeendamaged.Butevenmoreimpressivethedevicecouldtellwhichtypeofdamage﹣byinsectsorwithaholepunch﹣hadbeendonetothetomatoleaves. Withsomefine﹣tuningadevicelikethee﹣nosecouldonedaybeusedingreenhousestoquicklyspotharmfulbugstheresearcherssay.AdevicelikethiscouldalsobeusedtoidentifyfruitsthatareperfectlyripeandreadytopickandeatsaysNataliaDudareveabiochemistatPurdueUniversityinWestlafayetteInd.whostudiessmellsofflowersandplants.Hopefullyscientistsbelievethedevicecouldbringlargebenefitstogreenhousemanagersinthenearfuture. 1.Welearnfromthetextthatplantscommunicatewitheachotherby. A.makingsomesounds B.wavingtheirleaves C.producingsomechemicals D.sendingoutelectronicsignals 2.Whatdidthescientistsdotofindoutifthee﹣noseworked? A.Theypresenteditwithallcommoncrops. B.Theyfixed13sensorsinsidethedevice. C.Theycollecteddifferentdamagedleaves. D.Theymadetestsondamagedandhealthyleaves. 3.Accordingtothewriterthemostamazingthingaboutthee﹣noseisthatitcan. A.pickoutripefruits B.spottheinsectsquickly C.distinguishdifferentdamagestotheleaves D.recognizeunhealthytomatoleaves 4.Wecaninferfromthelastparagraphthatthee﹣nose. A.isunabletotellthesmellofflowers B.isnotyetusedingreenhouses C.isdesignedbyscientistsatPurdue D.ishelpfulinkillingharmfulinsects 5.Whichsectionofnewspaperdoesthepassageprobablybelongto? A.Sport B.Life C.Discovery D.Entertainment
Cancerisfearedbyeveryone.Andthisfearisreachingepidemic流行性proportions.Notthediseaseitself﹣thereisnosuchthingasacancerepidemic.Exceptforlungcancermostlycausedbycigarettesmokingtheincidencerates发病率arelevelingoffandinthecaseofsomekindsofcanceraredecreasing.ButthefearofcanceriscatchingandthecountrystandsatriskofananxietyTheearthitselfiscomingtoseemlikeahugecarcinogen致癌物.Theordinarymoreorlessscientificstatementthatsomethingbetween80and90percentofallcancersareduetothingsintheenvironmentistakentomeanthatnoneofuswillbesafeuntilthewholeenvironmentiscleanedup.Thisisnotatallthemeaning. The80﹣percentcalculationisbasedontheunthinkabledifferencesintheincidenceofcancerinvarioussocietiesaroundtheworld﹣forexamplethehighproportionoflivercancerinAfricaandtheFarEaststomachcancerinJapanbreastcancerinWesternEuropeandNorthAmericaandtherelativelylowfiguresforbreastcancerinJapanandpartsofAfricaandforlivercancerinAmerica.Thesedataindicatetheremaybespecialandspecificenvironmentalinfluenceslargelybasedonpersonallife﹣stylethatdeterminetheincidenceofvariousformsofcancerindifferentcommunities﹣butthatisallthedatasuggest.Theoverallincidenceofcancercountingupallthecasesisprobableroughlythesameeverywhere. 1.Whichofthefollowingisclosesttomeaningtothephraselevelingoff? A.Becameverypopular B.Reacheditslowestlevelinpopularity C.Stoppedbeingpopular D.Stoppedincreasingitspopularity 2.Accordingtothepassagetheincidenceofcancerisgenerallybelieved A.tobebasedoninactivelifestyle B.tobeduetoanxiety C.toresultfromenvironmentalinfluences D.tobecausedbyheavysmoking 3.Itcanbeinferredfromthepassagethatthewriter'sopinionabouttherelationshipbetweencancerandenvironmentis. A.positive B.negative C.neutral D.approving 4.Accordingtothepassagethewriterseemstofeelthat. A.theriskofcatchingcancerisontherise B.thewholeearthiscomingtoseemlikeahugecarcinogen C.theriskofcatchingcancerisn'tsogreataspeoplethink D.cancercanbecurediftheenvironmentiscleanedup 5.Whichofthefollowingwouldbethebesttitleforthepassage? A.CancerandEnvironment B.TheFearCausedbyCancers C.DataonCancerIncidence D.CanceranditsInvestigation
研究表明蛙未受精卵细胞的细胞质中储存有大量的mRNA．蛙卵在生理盐水中能正常合成mRNA而物质甲会抑制mRNA的合成．通过设计实验检测蛋白质合成量探究蛙受精卵早期分裂过程中20小时内蛋白质合成所需要的mRNA来源于卵细胞中原本储存的mRNA还是卵细胞受精后新合成的．下列相关叙述正确的是
如图是不同浓度的24﹣D溶液对洋葱生根影响的实验结果分析正确的是
执行如图所示的程序框图输出的S值是．
基因工程中可以通过PCR技术扩增目的基因．回答下列问题． 1基因工程中所用的目的基因可以人工合成也可以从基因文库中获得．基因文库包括和． 2生物体细胞内的DNA复制开始时解开DNA双链的酶是．在体外利用PCR技术扩增目的基因时使反应体系中的模板DNA解链为单链的条件是．上述两个解链过程的共同点是破坏了DNA双链分子中的． 3目前在PCR反应中使用Taq酶而不使用大肠杆菌DNA聚合酶的主要原因是．
最常见的塑化剂邻苯二甲酸二丁酯可由邻苯二甲酸酐与正丁醇在浓硫酸共热下反应制得反应的化学方程式及装置图部分装置省略如图 +C4H9OH 已知正丁醇沸点118℃纯邻苯二甲酸二丁酯是无色透明具有芳香气味的油状液体沸点340℃酸性条件下温度超过180℃时易发生分解． 由邻苯二甲酸酐正丁醇制备邻苯二甲酸二丁酯实验操作流程如下 ①向三颈烧瓶内加入30g0.2mol邻苯二甲酸酐22g0.3mol正丁醇以及少量浓硫酸． ②搅拌升温至105℃持续搅拌反应2小时保温至反应结束． ③冷却至室温将反应混合物倒出．通过工艺流程中的操作X得到粗产品． ④粗产品用无水硫酸镁处理至澄清→取清液粗酯→圆底烧瓶→减压蒸馏经过处理得到产品20.85g． 请回答以下问题 1步骤②中不断从分水器下部分离出产物水的目的是．判断反应已结束的方法是． 2上述实验可能生成的副产物的结构简式为填一种即可 3操作X中应先用5%Na2CO3溶液洗涤粗产品．纯碱溶液浓度不宜过高更不能使用氢氧化钠若使用氢氧化钠溶液对产物有什么影响用化学方程式表示． 4操作X中分离出产物的操作中必须使用的主要玻璃仪器有． 5粗产品提纯流程中采用减压蒸馏的目的是． 6本实验中邻苯二甲酸二丁酯式量是278的产率为．
已知过抛物线y2＝8x的焦点斜率为的直线交抛物线于Ax1y1Bx2y2x1＜x2两点．则线段AB的长度为
干扰素能抑制病毒的复制可增强巨噬细胞和T淋巴细胞的活力从而起到免疫调节作用．下图是利用基因工程技术生产干扰素的操作过程示意图请据图回答． 1图中①代表的是过程所获得的甲是． 2在生物体外重复②③④的步骤可以获得大量的甲这是技术．其中过程③需要酶． 3与人体细胞中干扰素基因相比甲不含有非编码区和． 4在利用甲乙获得丙的过程中必须用同一种切割甲和乙使它们产生相同的再加入连接形成丙． 5科学家将甲与的启动子等调控组件重组在一起形成的基因表达载体通过方法导入到哺乳动物的中进行早期胚胎培养当胚胎发育到阶段时进行胚胎移植同时__母体对移入子宫的胚胎基本上不发生才为移入的胚胎在__母体内的成活提供了可能使其生长发育成转基因动物．该动物进入泌乳期后可以通过分泌的乳汁中获得．
若双曲线x2+my2＝mm∈R的焦距4则该双曲线的渐近线方程为
Nooneknowsexactlyhowmanydisabledpeoplethereareintheworldbutestimatessuggestthefigureisover450million.ThenumberofdisabledpeopleinIndiaaloneisprobablymorethandoublethetotalpopulationofCanada. IntheUnitedKingdomaboutoneintenpeoplehavesomedisability.Disabilityisnotjustsomethingthathappenstootherpeople.Aswegetoldermanyofuswillbecomelessmobilehardofhearingorhavefailingeyesight. Disabilitycantakemanyformsandoccuratanytimeoflife.Somepeoplearebornwithdisabilities.Manyothersbecomedisabledastheygetolder.Therearemanyprogressivediseases.Thelongertimegoesontheworsetheybecome.Somepeoplearedisabledinaccidents.Manyothersmayhaveaperiodofdisabilityintheformofamentalillness.Allarebypeople'sattitudetowardsthem. Disabledpeoplefacemanyphysicalbarriers.Nexttimeyougoshoppingortoworkorvisitfriendsimaginehowyouwouldmanageifyoucouldnotgetupstepsorontobusesandtrains.Howwouldyoucopeifyoucouldnotseewhereyouweregoingorcouldnothearthetraffic?Butthereareotherbarriers:prejudicecanbeevenhardertobreakdownandunavoidablyrepresentsbyfarthegreatestbarrierofall.Itisalmostimpossiblefortheable﹣bodiedtofullyappreciatewhatthedisabledgothroughsoitisimportanttodrawattentiontothesebarriersandshowthatitistheindividualpersonandtheirabilitynottheirdisabilitywhichcounts. 1.Thefirstparagraphpointsoutthat. A.itispossibletogetanexactfigureoftheworld'sdisabledpeople B.therearemanydisabledpeopleintheworld C.thenumberofdisabledpeopleinIndiaisthegreatest D.IndiahasnotmuchmoredisabledpeoplethanCanada 2.ThekeywordinParagraph4is. A.barriers B.ignorance C.disability D.prejudice 3.Thelastwordofthepassagecountsmostprobablymeans. A.ismostimportant B.isincluded C.isconsidered D.isnumbered 4.WhichofthefollowingstatementsisNOTtrueaccordingtothepassage? A.eventheable﹣bodiedmaybecomedisabledinsomeway B.thedisabledprefertobeignoredbytheable﹣bodied C.prejudiceagainstthedisabledshouldberemoved D.Thedisabledmakeupabout10percentintheUK'spopulation 5.Itcanbeconcludedfromthepassagethat. A.weshouldtryourbesttopreventdisability B.wemusttakeaproperattitudetowardsthedisabled C.theable﹣bodiedpeoplewillneverfullyunderstandthedisabled D.bothphysicalandmentalbarriersarehardtobreakdown.
如图为神经系统内分泌系统与免疫系统之间相互关系的样例示意图据图回答． 1神经系统内分泌系统与免疫系统之间的信息分子存在着填“单向”或“双向”调节作用．图中神经系统内分泌系统免疫系统各自产生的信息分子分别是填序号和免疫活性物质可直接与靶细胞细胞膜表面的结合． 2焦虑紧张等应激刺激使下丘脑分泌的激素含量升高最终导致血液中肾上腺糖皮质激素的浓度使免疫功能受抑制因此肾上腺糖皮质激素可以用于以下填字母的治疗 a．系统性红斑狼疮b．艾滋病c．过敏反应d．器官移植e．先天性胸腺发育不良 3三大系统相互配合借助信息分子相互作用构成了调节网络共同维持内环境的稳态．例如成年人甲状腺激素分泌过量会使神经系统的加强．
Therearemomentsinlifewhenyoumisssomeonesomuchthatyoujustwanttopickthemfromyourdreamsandhugthemforreal!Dream1youwanttodreambecauseyouhaveonlyonelifetodoallthethingsyouwanttodo. Mayyouhaveenoughhappinesstomakeyousweetandenoughtrialstomakeyoustrong?Alwaysput2inothers'shoes.Ifyoufeelthatithurtsyouitprobablyhurtstheotherpersontoo. Thehappiestofpeopledon't3necessaryhavethebestofeverything.Theyjustmakethemostofeverything4comesalongtheirway.Happinessliesforthosewho5searchandthosewhohavetriedforonlytheycanappreciatetheimportanceofpeoplewhohavetouchedtheirlives.Lovebeginswithasmilegrowswithakissandends6atear.Thebrightestfuturewillalwaysbebasedon7forgottenpast.Youcan'tgoonwellinlife8youletgoofyourpastfailuresandheartaches. Whenyouwerebornyouwerecryingandyourfamilywerearoundyou9smile.Liveyourlifesothatwhenyoudieyou'rethe10whoissmilingandeveryonearoundyouiscrying. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
已知函数fx＝x+lnx则f′1的值为
你在本地报纸上读到对健身教练Michael的采访请你用英语向班里的同学介绍这篇报道的内容. 【写作内容】 【写作要求】 1.只能使用5个句子表达全部内容; 2.作文中不能出现真实姓名和学校名称. 【评分标准】 句子结构准确信息内容完整篇章结构连贯. .
随着我国经济的发展居民的储蓄存款逐年增长．设某地区城乡居民人民币储蓄存款年底余额如下表 1求y关于t的回归方程＝t+ 2用所求回归方程预测该地区2016年t＝6的人民币储蓄存款． 附回归方程＝t+中 ．
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