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某研究小组对碘化钾溶液在空气中发生氧化反应的速率进行实验探究． 【初步探究】 （l）为探究温度对反应速率的影响，实验②中试剂A应为 ． （2）写出实验③中I﹣反应的离子方程式： ． ...
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高三下学期化学《》真题及答案
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下列说法符合事实的是
漂白精的有效成分是NaClO
碘化钾的水溶液遇淀粉现蓝色
硫在空气中燃烧生成SO2，在纯氧中生成SO3
漂白精露置空气中变质，既发生氧化反应又发生非氧化还原反应
库仑滴定法测全硫的要点是煤样在催化剂作用下于空气流中燃烧分解煤 中硫生成硫氧化物并被碘化钾溶液吸收以
把滤纸用淀粉和碘化钾的溶液浸泡晾干后就是实验室常用的淀粉碘化钾试纸这种试纸润湿后遇到氯气会发生什么变
下列物质不能与溴水发生反应的是
苯酚溶液；
苯乙烯；
碘化钾溶液；
甲苯。
下列物质在空气中久置会发生变质在变质过程中既有氧化还原反应发生又有非氧化还原反应发生的是
NaOH溶液
漂粉精
氯水
碘化钾
由于地震和海啸日本福岛第一核电站发生严重的核辐射泄漏日本政府向福岛核电站附近居民发放碘片主要成分是碘
由于地震和海啸日本福岛第一核电站发生严重的核辐射泄漏日本政府向福岛核电站附近居民发放碘片主要成分是碘
过氧化值测定时若使用的碘化钾溶液在进行空白试验时加入淀粉溶液后呈兰色则碘化钾试剂不合格
下列各组溶液中不能发生化学反应的是
氯水和溴化钠
氯水和碘化钾
溴水和氯化钠
溴水和碘化钾
溴水和碘化钠
向CuSO4溶液中逐滴加入碘化钾溶液至过量观察到产生白色沉淀CuI蓝色溶液变棕色再向反应后的溶液中通
通入22.4LSO
2
参加反应时，有2N
A
个电子发生转移
通入SO
2
后溶液逐渐变成无色，体现了SO
2
的漂白性
滴加碘化钾溶液时，KI被氧化，CuI是氧化产物
上述实验条件下，微粒的氧化性:Cu
2+
>I
2
>SO
2
硝酸汞和碘化钾溶液混合后会生成红色的碘化汞沉淀为了探究硝酸汞和碘化钾溶液之间能否发生氧化还原反应研究
如图装置的电流方向是从C
1
到C
2
C
1
是负极，发生的反应是2I
－
＝I
2
＋2e
－
K
+
离子向C
1
电极流动
装置发生的总反应是Hg
2+
+2I
－
＝HgI
2
↓
某实验小组为探究ClO﹣I2SO42﹣在酸性条件下的氧化性强弱设计实验如下实验①在淀粉碘化钾溶液中加
下列物质在空气中久置会发生变质在变质过程中既有氧化还原反应发生又有非氧化还原反应发生的是
NaOH溶液
氯水
漂白粉
碘化钾
下列物质在空气中久置会发生变质在变质过程中既有氧化还原反应发生又有非氧化还原反应发生的是
NaOH溶液
漂粉精
氯水
碘化钾
亚硝酸钠NaNO2是工业盐常被误食引起中毒已知它能氢碘酸HI发生反应生成NO和碘单质1上述反应中氧化
某实验小组为探究ClO－I2SO42－在酸性条件下的氧化性强弱设计实验如下实验①在淀粉碘化钾溶液中加
用淀粉碘化钾试纸做外指示剂是因为
亚硝酸与碘化钾反应比芳伯胺起重氮化反应快得多，无法观察终点。
淀粉碘化钾在溶液中不能变色
碘化钾与重氮盐先起反应，无法观察终点。
碘化钾与芳伯胺先起反应，无法观察终点
实验小组探究ClO－I2SO在酸性条件下的氧化性强弱实验如下实验①在淀粉碘化钾溶液中加入少量次氯酸钠
1化学小组选用下图装置制取并收集氧气①仪器的名称a是______b是______②实验事制取氧气的化
溴酸盐剩余量滴定法是将试样用冰乙酸和水溶解后
加入已知过量的碘化钾标准溶液，待反应完全后，加入溴酸钾—碘化钾，用硫代硫酸钠标准溶液滴定
加入已知过量的硫代硫酸钠标准溶液，待反应完全后，加入溴酸钾，用碘化钾标准溶液滴定
加入已知过量的溴酸钾—溴化钾标准溶液，待反应完全后，加入碘化钾，用硫代硫酸钠标准溶液滴定
加入已知过量的硫代硫酸钠标准溶液，待反应完全后，加入溴酸钾—溴化钾，用碘化钾标准溶液滴定
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细胞外葡萄糖浓度调节胰岛B细胞分泌胰岛素的过程如图甲所示回答下列问题 1细胞呼吸将葡萄糖中释放的化学能贮存在中Ca2+内流促使细胞通过方式释放胰岛素． 2细胞外葡萄糖浓度降低会导致胰岛素释放受到填“促进”或“抑制”作用原因是细胞外葡萄糖的浓度会影响细胞呼吸进而首先影响离子通道的结构． 3下丘脑也可调节血糖平衡如图乙所示影响胰岛B细胞分泌活动的物质有葡萄糖．写出通过A途径引起胰岛B细胞分泌胰岛素的反射弧．
某实验小组用一定浓度的萘乙酸NAA溶液和激动素KT溶液探究二者对棉花主根长度及侧根数的影响结果如图所示．据此分析下列相关叙述错误的是
有关物质跨膜运输方式的叙述正确的是
如图为某遗传病的家系图已知该疾病受一对等位基因设为A/a控制且该家系中的正常人均不携带该致病基因所有患者均携带该正常基因在不考虑XY染色体同源区段遗传染色体变异和基因突变的条件下回答下列问题 1该病的遗传方式是．人群中男性的发病率填“大于”“等于”或“小于”女性的发病率． 2Ⅱ1和Ⅱ2的基因型分别是他们再生一个孩子是女性患者的概率为． 3Ⅲ1与正常人结婚后代患该病的概率为0理由是． 4若Ⅲ2与一位正常男子结婚后代同时患该病和红绿色盲的概率为则对于该家系中的第Ⅱ代满足该概率的条件是．
已知某植物的花色有金黄花ABBaa黄花ABb白花Abb叶片大小有小叶DXE中叶DXeXeDXeY大叶dd控制花色叶片表面积的基因各自独立遗传．分析回答 1用两株金黄花植株作为亲本进行杂交F1全为黄花植株F1雌雄杂交产生F2．F1植株的基因型是F2的表现型及比例是．若F2中的白花植株随机受粉后得到900株植株则其中金黄花植株约有株． 2现有两株小叶植株杂交所得F1只有小叶和中叶两种类型． ①亲本基因型杂交组合有种F1中的中叶植株所占的比例是． ②请设计杂交实验探究亲本小叶雄株的基因型． 实验思路． 实验现象及结论a．b．．
鸡干扰素是一种具有高效和广谱抗病毒作用的细胞因子广泛用于动物领域的抗病毒治疗．科研人员将鸡干扰素基因作为目的基因构建基因表达载体通过农杆菌介导法导入烟草以获得抗病毒烟草．回答问题 1目的基因合成后可在Taq酶的作用下通过PCR技术大量扩增该技术的原理是．利用PCR技术扩增干扰素基因时需要加入两种引物原因是． 2基因表达载体中应有RNA聚合酶识别和结合的部位该部位称为．将基因表达载体导入农杆菌常用的方法是． 3该实验中将农杆菌转入烟草细胞的原生质体原生质体再生出细胞壁．请从理论角度提出实验室检测原生质体是否再生出细胞壁的一种方法． 4科研人员提取烟草愈伤组织细胞的RNA后先通过获得DNA再进行PCR扩增．若最终未能检测出干扰素基因可能原因是若转基因烟草植株对病毒的侵染表现出一定的抗性但抗性较低可能原因是．
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来写的以下作文.文中共有10处语言错误每句中最多有两处.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\划掉. 修改在错的词下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. Haveyoueverhadheadacheduringatest?Haveyoueverbeentooconcernedaboutsomethingthatyouevencan'tsleepatnight?Ifsothenyouknowthatstressis.Toomuchstresscanresultinangrydepressionandotherrelatedproblemswhichweneedtotakethemseriously. Howevernotallstresswasharmfultoyou.Somekindsofstresscanhelpyougettingthingsdonebetterlikewhenyouarerunningtowardsthefinishinglineorwhenyouareaskingtodeliveraspeechtoyourclass.Stresssometimescanpushyoutomakefullpreparationsforatest. Thebestapproachofreducingstressistohaveabalancedlife.Ifyougetenoughsleepeatpropertakemoreexerciseandhaveenoughfuntimeyoumightfeellessstressed.
Peoplebecomeaddictedtomanythings.Someofthesemaybedrugsalcoholandsmokingbutalsoelectronics.Electronicsgetyouaddictednotbecauseofdrugslikenicotinebutbecauseofsomethingcalleddopamine多巴胺. Dopamineisachemicalnaturallyproducedinthebodythathelpscontrolthebrain'srewardandpleasurecenters.Itisreleasedwhenyouwinsomething.Younotonlygetdopaminefromwinningsportslikefootballortennisbutalsogetasmallamountofdopaminewhenyouhearanotificationfromyourdevicewinsomethinginavideogameorevensimplysurfthewebonyoursmartphone.Yourbodylovesthefeelofdopamineandtriestofindmorewaystogetitwithlesseffortwhichcanleadtoaddictiontoelectronics. Webecomeaddictedtovariouselectronics.Butamongallofthemphonesmaynotdotoomuchharmtousphysically.It'sdevicessuchastelevisionsandcomputersthatcauseyoutositfortoolongwithoutstretchingormovingwhichcanresultinaconditionknownasdeepveinthrombosis深静脉血栓.Itcancauseseriousdamagetoourhealth. Howeverwecantrytobreakawayfromaddiction.Wecanmakeaccesstoourdevicesalittlemoredifficultwhichcandiminishthechancesofusactuallywantingtogoanddothatspecificthing.Forexampleifyouknowyoufrequentlyuseanapponyoursmartphoneyoucanputtheappincertainfarcornerofyourphonethereforeitwouldtakeyoualittleextratimetogettoitinsteadofjustturningthephoneonandhavingdirectaccesstoit.Besideswecanpreventphysicalproblemsbyusingastandingdesk.Thisisbasicallyadeskbutyouhavetostandatitinsteadofsittingonit.Thiscanpreventawiderangeofphysicalproblemsincludingobesitylowerriskofheartdiseaseandsoon. Allinallelectronicsprobablyalreadyhaveyouaddicted.Thankfullytherearewaysyoucangetoutofthisaddiction.It'snotalostcauseandyoucanstillgetyourselfhealthyandoutofaddiction. 1Whenweplaywithelectronicsthedopamineproducedinthebody. A.isbadforourmentalhealth B.causesaddictiontoelectronics C.increasesthechanceofwinning D.isinchargeofourbrain'sactivities 2WecaninferfromParagraph3thatphones. A.areharmlesstoourphysicalhealth B.dogreatharmtoourmentalhealth C.arenomoreaddictivethanotherdevices D.don'tharmourbodyasmuchasotherdevices 3WhatdoestheunderlinedworddiminishinParagraph4mean? A.Reduce. B.Ruin. C.Access. D.Seize. 4WhatdoestheauthorintendtodoinParagraph4? A.Advertiseanewstandingdesk. B.Callonpeoplenottouseelectronics. C.Advisepeopletousetheirappswisely. D.Providewaysofgettingridofaddictiontoelectronics.
Awomanprofessorwalkedaroundinaclassroomwhileshewasteachingstressmanagementtoherstudents.1sheraisedaglassofwater2expectedtheywouldbeaskedthehalf﹣emptyorhalf﹣fullquestion. Insteadwitha3onherfacesheaskedWhat'sthe4ofthisglassofwater? 5calledoutrangedfromeighttotwentyounces盎司. She6thestudentsdownandthenrepliedTheabsoluteweightdoesn'tmatter.Itall7howlongIholdit.IfIholditforaminuteit'snotaproblem.IfIholditforanhourI'llhavea8inmyarm.IfIholditforadaymyarmwillfeelnumb麻木andparalyzed麻痹.Ineach9theweightoftheglassofwaterdoesn'tchangebutthelongerIholditthe10itbecomes.Doyouknowwhy? Allthestudentskeptsilentandlistenedcarefullylostinthought. She11Ourand12inlifearelikethatglassofwater.Thinkaboutthemforawhileandnothing13.Thinkaboutthemabitlongerandtheybegintohurt.Andifyouthinkaboutthemalldaylongyouwillfeel14unabletodoanything. It'simportantto15toletgoofyourstresses.Asearlyintheeveningaspossibleputallyourburdensdown.Don't16themthroughtheeveningandintothenightRemembertoputtheglassdown! Moreoftenthannotlifegets17whenwethinktoomuch.Andthemomentyou18yourburdenyou'llfindyourselffeelingsomuchmorerelaxed. So19wonderingaroundandfeelingsorryforyourselfstartdoingsomethingaboutit.Afteralllifeistooshorttodevoteyourselftoanythingthatmakesyou20. 1A.If B.As C.However D.Though 2A.everyone B.nobody C.someone D.anyone 3A.look B.puzzlement C.smile D.surprise 4A.quality B.weight C.amount D.problem 5A.solutions B.numbers C.methods D.answers 6A.quieted B.stopped C.signed D.signaled 7A.decidedon B.dependson C.resultedfrom D.resultedin 8A.cut B.problem C.danger D.pain 9A.glass B.way C.case D.manner 10A.moreserious B.more C.harder D.heavier 11A.continued B.explained C.commented D.replied 12A.worries B.anger C.discomfort D.problem 13A.matters B.helps C.happens D.works 14A.shocked B.dissatisfied C.angry D.discouraged 15A.come B.remember C.realize D.believe 16A.get B.carry C.put D.take 17A.exciting B.frightening C.terrible D.colorful 18A.undertake B.refuse C.remove D.change 19A.ratherthan B.morethan C.besides D.Asto 20A.relaxed B.unsure C.excited D.unhappy
玉米非糯性基因A对糯性基因a是显性A﹣a﹣表示该基因所在染色体发生部分缺失缺失区段不包括A和a基因缺失不影响减数分裂过程．为验证染色体缺失的花粉不育而染色体缺失的雌配子可育现有AAAaaaAA﹣A﹣aaa﹣共6种玉米植株下列哪种实验方案最合适
Becominganeffectiveandefficientstudentisnotsomethingthathappensovernightbutputtingafewofthesetipsintodailypracticecanhelpyougetmoreoutofyourstudytime. Focusonlearninginmorethanoneway.Insteadofjustlisteningtoapodcastwhichinvolvesauditory听觉的learningfindawaytorepeattheinformationbothverbally口头地andvisually.Youcandescribewhatyoulearnedtoyourfriend.1. Teachwhatyou'velearnedtoanotherperson.Startbytranslatingtheinformationintoyourownwords.2.Someideasincludewritingablogpostcreatingapodcastorparticipatinginagroupdiscussion. Gainpracticalexperience.Ifyouaretryingtoacquireanewskillorabilityfocusongainingpracticalexperience.3.Ifyouarelearninganewlanguagepracticespeakingwithanotherpersonandsurroundyourselfwithlanguage﹣immersionexperiences. 4.Weknowlearningisn'taperfectprocess.Sometimesweforgetthedetailsofthingsthatwehavealreadylearned.Ifyoufindyourselfstrugglingtorecallsomeinformationresearchshowsthatyou'dbettersimplylookupthecorrectanswerbecausethatrecallingmayresultinlearningtheerrorstateinsteadofthecorrectresponse. Understandhowyoulearnbest.Anothergreatstrategyforimprovingyourlearningefficiencyistorecognizeyourlearninghabitsandstyles.5.Thenyourlearningefficiencycanbeimprovedgreatly. A.Recallingresultsinthewronganswer. B.Lookupanswersratherthanstruggletoremember C.Nextfindsomewaystosharewhatyou'velearned. D.Youcanapplyitbysharingyournewlylearnedskills. E.Ifitisasportofathleticskillperformtheactivityregularly. F.Thathelpsyougainabetterunderstandingofhowyoulearnbest. G.Intheprocessyoucanmaketheknowledgemorepermanentinyourmind.
Lionstigersandotheranimalsarestayingawakeatnight1avoidhumanbeingsanewstudyfinds. Scientistshaveknown2humanactivitiescanleadtochangesinnature.Manyanimalsmaymovearoundlessortraveltofarplacestokeepaway3people.Byawakingatnightanimalscanalsobeonguardagainstpossibleenemiesandspendlesstime4lookforfood. Thelatestresearchfoundthatevenactivitieslikefarmingandcampingcan5frightanimalsandcausethemtobecomemoreactiveatnight.Researcherscompared6carefulhowmuchtimethoseanimalswereactiveatnightinareasofhumanactivitiessuchashuntingandfarming.7washumanactivitiesthatcausedanincreaseofabout20percentinnight﹣timeactivitiesevenincreaturesthatusuallysleepatnight.Results8publishinthejournalSCIENCEtwomonthsago. Thenewfindingsare9usualbecausenooneelsehaslookedatitinsuchdetailbefore.EcologistMarleeTuckerwas10surprisethatanykindofhumanactivitiesisenoughforanimalstoseepeopleasathreat.
据英国路透社1月22日报道英国科学家正在积极探索通过转基因技术培育出抗H5N1型禽流感病毒的转基因鸡．科学家们希望这项研究成果阻止人类致命性流感疫情的暴发．回答下列问题 1要获得转基因鸡首先要利用酶获取目的基因实验室中要先对该基因利用技术进行扩增．将该基因导人鸡细胞所用的方法是． 2获得转基因鸡的基因工程步骤中的核心步骤是通常采用技术检测外源基因是否插入到鸡的基因组． 3若获得的转基因鸡抗H5N1型禽流感病毒的能力没有提高根据中心法则分析其可能的原因是． 4由于转基因鸡从孵化到长成的时间比转基因奶羊和奶牛都短得多从孵化成鸡到能下蛋只需7个半月因此有可能成为一种更快速和更丰富的生物制药来源检测鸡体内是否出现药用蛋白在分子水平上的检测方法及结果是什么
将适量等长度等体积的相同土豆条均分为三组分别置于等体积的甲乙丙溶液中一段时间甲溶液与丙溶液的溶质是同种物质直至b时后均同时放回相应溶液的低浓度溶液中一段时间．实验期间持续观察土豆条体积变化并计算相对体积结果如图以下说法正确的是
PracticalWaystoShowRespectforaFriend ●Showrespectfortheirlifechoicesanddecisions 1.Theywillmakedifferentlifechoiceshavedifferentviewsonpoliticsandreligionandactdifferentlyinmanyways.Thisdoesn'tmeantheycan'tbeyourfriend.Itmeansthatyou'llneedtotakeastepbackreservejudgmentandshowrespect. ●Givethemthebenefitofthedoubt Assumptions猜疑canbeadangerousthing.2.Berespectfulandgivethemthebenefitofthedoubtwhenyoudon'tdo.Thisalonewillhelpyoustayintheirgoodgraces好感. ●Givefriendsyourfullattention Oneofthebestwaystoshowrespectforsomeoneistolistentothemfully.Allowthemtopauseconveynonverbalcommunicationcluescollecttheirthoughtsandgetitallout.Toooftenfriendslistenwithhalfanearorjumpintheminutetheirfriendpauseswithanevenworsestory3.Whenyourfriendistalkingpayattention. ●4 Treatyourfriendsrespectfullywhenyouarguewiththem.Makeyourfriendshipasafeplacebynotembarrassingyourfriendorexpressingyourprivatedisagreementsinfrontofotherpeople.Bepubliclysupportiveandkindtoyourfriendssotheyknowyouvalueyourfriendshipwiththem. ●Showupbethereanddowhatyousayyou'regoingtodo 5.Sojustshowyourfriendthebestkindofrespectbybeingontimekeepingpromisesandbeingtheonefriendtheycanalwayscounton.That'sthewaytotrulyshowrespect. A.Acceptthatpeoplearen'talwaysgoingtobejustlikeyou. B.Noonelikesanunreliablefriendwhosaysthey'llbethereandthendoesn'tshow. C.Tellyourfriendswhatyouthinkaboutthemdirectly. D.Thistypeofbehaviorisverydisrespectful. E.Infactyoucandoeverythingbutacceptthedifferences. F.Ifyou'reindoubtaboutsomethingaskyourfriend. G.Consideryourfriendshipapreciousgift.
Alargebodyofresearchhasbeendevelopedinrecentyearstoexplainmanyaspectsofwillpower.Mostoftheresearchersexploringself﹣controldosowithanobviousgoalinmindHowcanwillpowerbestrengthened?Ifwillpoweristrulyalimitedresourceastheresearchsuggestswhatcanbedonetomakeitstaystrong? Avoidingtemptation__isaneffectivemethodformaintainingself﹣controlwhichiscalledtheoutofsightoutofmindprinciple.Onerecentstudyforinstancefoundofficeworkerslessattractedtocandyinthedeskdrawerthanthatontopoftheirdesksinplainsight. Theresearchsuggestingthatwepossessalimitedreservoirofself﹣controlraisesatroublingquestion.Whenwefacetoomanytemptationsarewetofail?Notnecessarily.Researchersdon'tbelievethatone'swillpowerisevercompletelyexhausted.Ratherpeopleappeartoholdsomewillpowerinreservesavedforfuturedemands.Therightmotivationallowsustotapintothosereservesallowingustocarryonevenwhenourself﹣controlstrengthhasbeenrundown.Highmotivationmighthelpovercomeweakenedwillpower﹣atleasttoapoint. Willpowermayalsobemadelessvulnerable脆弱tobeingexhaustedinthefirstplace.Researcherswhostudyself﹣controloftendescribeitasbeinglikeamusclethatgetstiredwithheavyuse.Butthereisanotheraspecttothemusclecomparisontheysay.Whilemusclesbecomeexhaustedbyexerciseintheshorttermtheyarestrengthenedbyregularexerciseinthelongterm.Similarlyregularpracticesofself﹣controlmayimprovewillpowerstrength. Theevidencefromwillpower﹣exhaustionstudiesalsosuggeststhatmakingalistofresolutionsonNewYear'sEveistheworstpossibleapproach.Beingexhaustedinoneareacanreducewillpowerinotherareassoitmakesmoresensetofocusonasinglegoalatatime.Inotherwordsdon'ttrytoquitsmokingadoptahealthydietandstartanewexerciseplanatthesametime.Takinggoalsonebyoneisabetterapproach.OnceagoodhabitisinplaceBaumeistersaysyou'llnolongerneedtodrawonyourwillpowertomaintainthebehavior.Eventuallyhealthyhabitswillbecomeroutineandwon'trequiremakingdecisionsatall. 1Fromthestudiesinthepassagewelearnthat. A.peoplehaveunlimitedself﹣control B.highmotivationensuresone'ssuccess C.willpowerishardlycompletelyexhausted D.toomanytemptationsoftenleadtofailure 2TheunderlinedphrasetapintoinParagraph3mostprobablymeans. A.makeuseof B.runoutof C.build D.increase 3Theauthorcomparesself﹣controltomuscles. A.toprovethelong﹣termeffectofwillpower B.toshowthesignificanceofregularexercise C.toarguethatself﹣controlcanheeasilyusedup D.toexplainthebenefitsofpracticingself﹣control 4Todevelopagoodhabitwhichofthefollowingdoestheauthorprefer? A.Iwillgiveupdessertanddoexercise. B.Iwillsetthreegoalsthisnewsemester. C.IwillreadanEnglishnoveleverymonth. D.Iwillkeepmyselffromanytemptation.
血糖浓度保持动态平衡对机体生命活动具有重要作用如右图为胰岛素作用机理模式图请分析回答 l胰岛素的生理功能是能促进组织细胞加速摄取和葡萄糖从而使血糖浓度降低． 2胰岛素属于一种信息分子除激素外人体内还有举一例也为信息分子胰岛素与靶细胞表面的受体结合后发挥作用受体的化学本质是． 3当正常人处于饥饿状态时血液中胰岛分泌的写激素名称含量增多它与胰岛素相互共同维持血糖含量的稳定． 4人体感染某病毒时胰岛B细胞会被自己的免疫细胞破坏引起I型糖尿病在免疫上这类疾病可称为II型糖尿病表现为组织细胞表面受体受损对胰岛素敏感性降低现有甲正常乙I型丙II型三人一次口服较多葡萄糖后三人的胰岛素分泌量由高到低的顺序是．
ToeducateagirlistoeducateathousandpeoplesaysMaimounaSamakéamotherofsixchildrenincludingfivegirls.Ifyouputoneseedinthegroundandraincomesitwillgrowtoproducemanyseeds. Samakéoneof2000residentslivesinasmallvillageSounkalainoneoftheworld'spoorestcountries.NowshehasachancetoseethiswishcometruethankstoBuildOnanAmericannon﹣profitorganizationthatisbuildingaschoolinhercommunity. For17yearsBuildOnhasbeensendingAmericanhighschoolstudentsoverseastocreateschoolsinplaceswhereliteracy文化andformaleducationareusuallyoutofreach.Theorganizationhasbuiltabout300schoolsinMaliMalawiNepalSenegalNicaraguaandHaiti.ItsgoalistogetyoungAmericansinmostlyurbanareastogetinvolvedineducation.Atthesametimeitcanbringliteracytochildrenandadultsinpoorvillagesinthedevelopingworld. Sounkala'scurrentschoolonlyhasabout70childrenmudfloorspoorlightingfewdesksandanabsenceofbooksmeanthattheschoolisnotthemostideallearningenvironment.ThereforetheycertainlycoulduseBuildOn'shelp. Samakéhasn'tbeentoschoolbutshewantsabetterfutureforherfivedaughtersincludingRamatou12andMariam10.WhenawomanattendsschoolshewillteachwhatshelearnstoherchildrensaidRamatouwhowantstobecomeadoctor.Shewillalsoknowhowtotakebettercareofherfamily. BuildOntriestobuildschoolsforgradesonetothree.Ifthingsgowelloverthosethreeyearstheyreturntohelpbuildanotherschoolforgradesfourtosixandthensetupeveningadultliteracyclasses. RamatouandMariamwillnotlearninsidethewallsofBuildOnschoolsincetheyarealreadyinthesixthgradebutSamakéhopesthattheywillbeabletoattendeveningclassestocontinuelearning. 1WhichofthefollowingaspectsofBuildOnisNOTmentionedinthetext? A.Itssourcesoffunding. B.Itshistory. C.Itsgoal. D.Itsapproach 2AccordingtothetextWhatkindofschoolisBuildOnmostlikelytohelp? A.inavillageinadevelopedcountry B.inanurbanareainadevelopingcountry C.inaruralareainadevelopingcountry D.inanearthquake﹣strickenareainadevelopedcountry 3WhatdoweknowaboutSamakéandherfamily? A.Mariamisinthesixthgrade. B.Samakéiswell﹣educated. C.Ramatouisadoctor. D.Samakéonlyhasdaughters. 4What'sthemainideaofthepassage? A.Awoman'sdreamofgoingtoschool. B.People'seducationconditionsinpoorareas C.BuildOn'sgreatcontributionstoeducationandlife. D.Anorganizationthathelpsbuildschoolsforpeopleinpoorareas
Drinkingwaterisoneofthefavorsyoucandotoyourbody.Ithassurprisinghealthbenefitssuchasmakingyou1energyandhappy.Thereisalonglistof2reasonwhywatershouldbeamustinyourdiet. Ifyouarelookingforaproductthathelpsyourecoverandbecomeyoungerwaterisagood3choose.Itcanhelpyourskinrecoverfasterafterbeinginjured.Hotwaterevenhelpsyourskinbecomesmooth. Wateris4keepsthefoodmovingdownthroughyourbody.Ifthereisnotenoughwaterinthebodyit'llbetoohardforthefood5passthroughthebody.Warmwaterhelpsbreakdownfoodfasterandcan6effectiverelieveyourskin.Accordingtoastudydrinkingtwocupsofwaterwillincrease7speedofdigesting8about30%.Thisincludeswarmwaterwhichincreasesyourbodytemperaturesothefoodcan9digestfaster. Hotwatercanalsoplayarolein10cleanyourskinsoinawayitisanaturalskincareproduct.Fewerharmfulbacteriaintheskinmeanasmallerriskofsufferingskindiseases.
Lookingforsomeplacesoutofthisworldtovisitonvacation?Herearefourcoolplacestovisit. KennedySpaceCenterVisitorComplex LocatedintheeastofOrlandoFloridait'sconsideredasthegreatestspaceadventureonEarth.Youcanmeetastronautseatspacefoodwatchmoviesaboutpastspacemissionsandifyou'reluckygettowatchanewlaunchdependingonthespaceprogram'sschedule.Remembertotakeenoughmoneyforadmissionandvarioussouvenirsintheworld'slargeststoredevotedtospacesouvenirsandNASAclothingandequipmentwhichmightcostafortune. AmericanMuseumofNaturalHistory It'sanimportantscientificandculturalinstitutionwithextremelyimpressiveexhibitionsandcollectionsabouthumanculturesthenaturalworldandtheuniverse.Themuseumlookslikeahugeglassboxwithahugeglobeenclosedwhichisquiteattractivetopeople.ItcontainsspaceandastronomyexhibitsamodelsolarsystemandthebeautifulHaydenPlanetarium天文馆. NewMexicoMuseumofSpaceHistory NobodywouldexpectsuchacoolspacemuseuminthedesertnearWhiteSandsNewMexicobutinfactthereisone!Thismuseumrecordsthearea'sspacehistory.Admissionticketsareavailableonthewebsiteanditoffersdiscountsforseniorcitizensandyoungstersunderage12. LowellObservatory TheLowellObservatorylocatedonMarsHilloverlookingFlagstaffwasbuiltinthelate1800sbyMassachusettsastronomyenthusiastPercivalLowelltohelphimstudyMars.VisitorstoLowellObservatorycanseethedomevisitClydeTombaugh'stombtaketoursandparticipateinastronomycamps.Theobservatoryisatanaltitudeofabout7200feetsobringsunscreendrinklotsofwaterandtakefrequentbreaks. 1WhatwillyouprobablyfaceinKennedySpaceCenterVisitorComplex? A.Riskysurrounding. B.Adventurousastronomycamps. C.Terriblespacefood. D.Relativelyhighconsumption. 2WhatisspecialaboutNewMexicoMuseumofSpaceHistory? A.Itssize. B.Itshistory. C.Itslocation. D.Itsbudget. 3Wherearevisitorsadvisedtohavemorerest? A.InKennedySpaceCenterVisitorComplex. B.InAmericanMuseumofNaturalHistory. C.InNewMexicoMuseumofSpaceHistory. D.InLowellObservatory.
ItseemsasifChristmasandtheirbirthdayaren'tenough.Kidshaveanotherdaywhichrevolves围绕aroundthem.TherearealotoffunnyactivitiesinShanghaiespeciallyforfamiliesasChildren'sDayfallson1stJune. IndooractivitiesatBigE BigEisagreatplaceforkids.Allkindsofballgamescanbefoundhere.ThisSundaytherearesomeotherinterestingactivitiesfreemoviesandamagicshowwiththreesessions场between9amand6pm. TheWizardofOzatKerryHotel IfeatingandrelaxingiswhatyourfamilyareinterestedinKerryHotelshouldbeyourfavouriteplace.TheCOOKandTheMEATbothofferexcellentbrunch早午餐everyweekend.BesidesTheBREWwillorganizeTheWizardofOzforchildreninarepeatofitsspecialEasterperformance. BrunchatCityBistro Ifyou'relookingforarestaurantwithamorerelaxingatmosphereandlowerpricethaneitherTheCOOKorTheMEATthengotoCityBistro.AspecialdiscountonitsbrunchthisSundayhasneverhappenedbefore.Whileparentsareenjoyingthefoodtheirchildrencanplayinthekids'cornerandletparentscatchtheirbreath. Children'sexhibitionatGalleryG1 IfgoingoutforbrunchistooregularfamiliescantrysomethingalittlemoreculturalatGalleryG1.Thereisanexhibitionofchildren'sartworknamedMySkywhichwillbedisplayedthisweekend.Therearealsoanumberofartistic艺术的activitiesforkidstotry. GetcreativeatPetitChameleon PetitChameleonattheDaycarecentreisorganizinganewactivitynamedArtfromtheStarttoshowkids'creativeability.TheeventisaboutancientGreece.OnSundayyouwillseekidsmaketheirownarmors盔甲. 1TheCOOKandTheMEATare. A.funnyactivities B.activitycenters C.greatperformers D.famousrestaurants 2HowdoesCityBistroattractpeople? A.Byprovidingfreeperformance. B.Byofferingkidsmanyfreetoys. C.Byservingbrunchatalowerprice. D.Byhelpingtakecareofkidsforpeople. 3WhereshouldchildrenwholovesportsgoonChildren'sDay? A.BigE. B.KerryHotel. C.CityBistro. D.GalleryG1.
Foodisnecessaryforofferingenergytoourbodiesbutsometimeswebuytoomuchofitatthestore.Whenyourfoodstartstogobadtherearemanyotherwaysyoucanstillmakeuseofitinsteadofthrowingitaway. Beforethrowingawayoldbananasyoucanusethepeels皮toshineupmetalsandleathers.Pressthepeelagainstthesurfacemoveitbackwardsandforwardsandthenpolishcleanitwithanoldcloth.Bananameatisalsogoodforreducingwrinkles.Putabitonthosetroublespotsletitsitforawhileandthenwashitoffandyourwrinkleswillgoaway.Lemonsaregreatforlighteningskinandhair.Ifyouhavetroublewithsomeskindiseaseslikeredspotsonyourfaceputabitoffreshlemonjuiceonthemandleaveitovernight.You'llnoticeadifferenceinthemorning.Appleswillhelpripen使成熟tomatoesquicklywhentheyareplacedtogetherinapaperbagandorangepeelsaregreatfirestartersforyournextbackyardcampfireparty. Ifyourdogorcatbringshomefleasusingsaltisagreatwaytogetridofthemaroundthehouse.Justpoursaltintothevacuumcleaner真空吸尘器.Letitsitthenvacuumupthefleas.Thesaltcankillthefleas.Besuretothrowawaythevacuumbagoremptythevacuumbinimmediatelyorsomeofthefleascanclimbout. Beerisagreathairlightener.Ifyouareoutoflemonstrydippingyourhairinbeerbeforegoingoutside.Justdon'tforgettowashitoutafterwards.Milkisgreatforremovingdirtymarksespeciallyifitissometypeofink. Asyoucanseetherearemanyotherusesforeverydayfoodsaroundthehouse.Sonexttimebeforethrowingfoodawaythinkingitisofnousestopforamomentandthinkaboutalltheirusestalkedabouthere. 1Howmanywayswemakeusefruitaretalkedaboutinthepassage? A.3 B.4 C.5 D.6 2WhichoftheAllowingcanbeusedtolightenyourhair? A.Lemonsandbeer. B.Bananasandlemon. C.Orangesandbeer D.Milkandlemon. 3WhatdoestheunderlinedwordtheyinParagraphsreferto? A.Apples B.Tomatoes C.Applestomatoesandapaperbag D.Applesandtomatoes. 4What'sthewriterattitudetosurprisinguseofeverydayfood? A.Negative B.Positive C.Concerned D.Careful
Myelephantadventuresbeganin1984whenwithourone﹣year﹣olddaughtermyhusbandandIcrossedthejungleinajeepslickingbehindalorryforcomfortandcompany.Theelephantsstandinglikewatchersoneithersideoftheforesthighwayhadusprayingforoursafety.Oneelephantmadeloudnoiseandangrilypawed抓thegroundwarningusoff.Weracedawaybeforetheycouldattack. Itwaswisetokeepelephantsatadistance.Weheardstoriesoftouristswhosejeepswereoverturnedandacoupleofphotographerswerekilledbecausetheymovedtooclose.Elephantsaremisleadinganimals.Theygivepeopleanimpressionofbeingquietandkindsotouriststhinkit'ssafetopicnicinthejungle丛林.Yetangryelephantshaveknockedthemdowninsecondsbeforetheycouldtakeoff. Elephantsmightmakelifeunpredictableanddangerous.It'sdifficultforinexperiencedenvironmentaliststoevenbegintograspthisreality.I'veheardcitypeoplesayWehumansareencroaching侵害ontheirforests.Butwhat'sthesolution? Whenapoorfarmerborrowsheavilytoplantacrophe'lldoanythingtoprotectitHislifedependsonitElephantsruininganabout﹣to﹣be﹣harvestedcomfieldcannotexpecttobewelcomedlikespecialguests.Thebattlebetweenbeastandfarmerisviolent. Expertsareworkingonsolutionstohuman﹣elephantconflicts冲突.Somearesuretofailtoliketheplanstobuildelectricfencesaroundhumansettlements.Elephantsrapidlyfigurethemoutandcomeinaroundandoverthem. Therearemorequestionsthananswersforsure.ButasmyhusbandsaidMorepeopledieincaraccidentseverysingledayineverycityontheearth.Buttheywon'ttakecarsofftheroadswillthey?Soweneedtoseekpracticalwaysofpreventingelephantaccidents. 1Whatisthewriter'spurposeinwritingParagraph1? A.Totellreadersherfamily'sexperienceofelephantadventure. B.Toshowreaderselephantsareangryanddangerous C.Tointroducethetopicofthewholepassage. D.Todescribehowherfamilykeepawayfromelephants. 2Whydotouriststhinkitissafetopicnicinthejungle? A.Theythinkelephantsarequietandkind. B.Theyhaven'theardthestoriesofelephantkillingpeople. C.Theylikeelephantstoomuch. D.Theythinktheycanraceawayinseconds. 3Whatdocsapoorfarmerdotoprotecthiscrop? A.Welcomeelephantlikespecialguests. B.Fightwithelephantsforhisharvest. C.Stopplantingcrops. D.Dependonelephantsforhislife. 4Whatcanwelearnfromthelasttwoparagraphs? A.Itisagoodideatobuildelectricfencesaroundhumansettlements. B.Itisimpossibletofindasolutiontosettlehuman﹣elephantconflict. C.Weshouldfirstreducecaraccidentstopreventelephantaccidents. D.Itisourdulytoprotectelephantsratherthankillthem.
Wildlifehasbeengreatlythreatenedinthemodernage.Therearespecies物种thatare1everyday.Thewhite﹣napedcraneisatypicalexample.Soscientistsaretryingtheirbestto2thespeciesfromgoingoutofexistence. ChrisandTimworkatazoohelpingendangeredcraneswiththeir3.Emmaafemalecranehasbeenintheir4sinceshearrivedin2004. BornataninternationalcranefoundationEmmawas5byhumancaretakers.Thisledtoanunexpected6thoughshehadawonderfultimethere.Emmahad7takenherselfasacraneandbecomedeeplyattachedtohumans.She8tolivewithmalecranesandevenhada9forkillingsomeofthemwhichmadeit10forhertobecomeamother. 11thetwozookeepersdidn'twanttoseetheextinction灭绝ofthispreciousspecies.Withtheirpatienceandeffortstheysuccessfullydevelopeda12ofartificialbreeding人工繁殖andnaturalreproduction.This13Emmatogivebirthtofivebabycranes. Thetwokeepersareproudoftheirproductivework.Butbeforetheycanbe14moreeffortsmustbemadebecausethepopulationofthecraneinthewildisonthe15andmanyotherspeciesappearheadedtowardextinction.16noteveryonehasrealizedthatwildlifehasthoughtsfeelingsandmostimportantlyequalrightstosurvive. Howcanwe17theever﹣wideninggapthatseparatesusfromotheranimals?ChrisandTimofferedusthe18humanbeingstookitforgrantedthattheir19heldallthesolutionsbutmaybetheirheartscanbeabetter20. 1A.growing B.migrating C.competing D.disappearing 2A.ban B.save C.split D.remove 3A.abortion B.recreation C.reproduction D.administration 4A.care B.eye C.mind D.story 5A.found B.chosen C.raised D.seized 6A.bonus B.consequence C.victory D.sacrifice 7A.never B.always C.unluckily D.cheerfully 8A.liked B.refused C.decided D.hesitated 9A.gift B.skill C.concern D.reputation 10A.illegal B.inspiring C.important D.impossible 11A.Therefore B.Moreover C.However D.Instead 12A.combination B.collection C.strategy D.system 13A.forced B.forbade C.taught D.enabled 14A.defeated B.grateful C.assured D.tolerant 15A.list B.rise C.agenda D.decline 16A.Incontrast B.Afterall C.Bytheway D.Onthecontrary 17A.leave B.bridge C.open D.identify 18A.course B.excuse C.answer D.reward 19A.brains B.behaviors C.services D.projects 20A.guide B.treat C.example D.companion
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. 修改在错的词下划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. Ihavereceivedandreadyourletterinwhichyoumentionthatyouwantedtoloseweightbydiet. Itisonlynaturallythatyounggirlsatyouragehopetolookbeautiful.Howeverinmyopinionhealthyismoreimportantthanbeauty.Forastudentstudyingisthefirstthingtoconsiderwhileappearanceissecond.Sodonotletothers'opinionstoaffectyournormallife.Thereforeifyoudowanttoloseweightitisagoodideatodoitbygettingmoreexerciseandchangingunhealthyeatinghabits.Themostimportantthingishowyoukeepahealthystateofmindasitwillhelpwithourstudiesandwillalsohelpyouovercomedifficultiesindieting. IhopemyadviceswillbehelpfultoyouandI'mlookingforwardtoyournextletter.
研究人员利用小鼠的单倍体ES细胞只有一个染色体组成功培育出转基因小鼠．其主要技术流程如图所示请分析回答下列问题 注ⅠⅡⅢⅣ代表四种限制酶．箭头指向的位置为限制酶的切割位置Ampr是氨芐青霉素抗性基因Neor是G418抗性基因． 1利用PCR技术可以扩增目的基因PCR反应体系中除含绶冲液模板DNAdNTP包含dATPdCTPdGTPdTTP引物以外还应含有引物应选用下图中的填图中标号． 2在基因工程操作步骤中过程①②称为．已知氨芐青霉素不能有效杀死小鼠细胞而一定浓度的G418能有效杀死不具有Neor的小鼠细胞．结合上图推测过程①选用的2种限制酶是选填图中的编号③处的培养液应添加填“氨芐青霉素”或“G418” 3细胞乙与类似图中桑椹胚需通过技术移入__小鼠子宫内继续发育进行该操作前需对受体小鼠进行处理．
小型犬浣熊为树栖动物属于食肉类动物也吃无花果和植物花粉等如图为小型犬浣熊种群相关曲线说法不正确的是
下列关于细胞增殖的叙述中正确的是
Attheageof14JamesHarrisonhadamajorchestoperationandherequired13units3.4gallonsofbloodafterwards.Theblooddonationssavedhislifeandhedecidedthatonceheturned18hewouldbegindonatingbloodasregularlyashecould. Morethan60yearsandalmost1200donationslaterHarrisonwhosebloodcontainsanantibody抗体thathassavedthelivesof2.4millionbabiesfrommiscarriages流产retiredasablooddonoronMay11.Harrison'sbloodisvaluablebecausehenaturallyproducesRh﹣negativebloodwhichcontainsRh﹣positiveantibodies.Hisbloodhasbeenusedtocreateanti﹣DinAustraliasince1967. Everybottleofanti﹣DevermadeinAustraliahasJamesinitRobynBarlowtheRhprogramdirectortoldtheSydneyMorningHerald.It'sanamazingthing.Hehassavedmillionsofbabies.Icryjustthinkingaboutit.SincethenHarrisonhasdonatedbetween500and800millilitersofbloodalmosteveryweek.He'smade1162donationsfromhisrightarmand10fromhisleft. I'dkeepgoingiftheyletmeHarrisontoldtheHerald.Hisdoctorssaiditwastimetostopthedonations﹣andtheycertainlydon'ttakethemlightly.Theyhadalreadyextendedtheagelimitforblooddonationsforhimandthey'recuttinghimoffnowtoprotecthishealth.Hemadehisfinaldonationsurroundedbysomeofthemothersandbabieswhohisbloodhelpedsave. Harrison'sretirementisablowtotheRhtreatmentprograminAustralia.Only160donorssupporttheprogramandfindingnewdonorshasproventobedifficult.ButHarrison'sretirementfromgivingblooddoesn'tmeanhe'scompletelyoutofthegame.ScientistsarecollectingandcataloginghisDNAtocreatealibraryofantibodiesandwhitebloodcellsthatcouldbethefutureoftheanti﹣DprograminAustralia. 1WhatdoweknowaboutJamesHarrison? A.Hesaved2.4millionpoorpeople. B.Heistoretireasablooddonor. C.Heisaverygratefulblooddonor. D.Hedonatesbloodnearlyeveryday. 2Whatistheauthor'spurposeofwritingParagraph4? A.TostateHarrison'sdecisiontocontinuedonatingblood. B.TodescribehowHarrison'sdonationscometoanend. C.TointroducesomebabiessavedbyHarrison'sblood. D.TopraiseHarrisonforhiscooperationwiththedoctors. 3WhatcanweinferfromthepassageaboutHarrison? A.AfterhisretirementtheRhprogramwillfail. B.Newdonorsareeasytofindinashorttime. C.HecontinuestocontributetotheRhprogram. D.HisDNAiskeptinalibraryforfuturestudy. 4Whichofthefollowingcanbethebesttitleforthetext? A.AUniqueManwithaRareBloodType B.TheBloodSavingMillionsofBabies C.ASpecialBloodproducer D.TheManwiththeGoldenArm
假定你是李华你的朋友Peter想了解你校于五月举办的中国传统文化艺术节.请你给Peter写封回信内容包括 1.举办艺术节的目的 2.介绍你最喜欢的一个艺术节活动 3.邀请Peter参加并告之艺术节活动的时间. 注意1.词数100左右 2.可以适当增加细节以使行文连贯.
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