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在图中A、B、C、D、E、F分别表示一种物态变化，其中发生 物态变化时物体都需要吸热：冬天，呼出的“白气”属于 物态变化（以上均选填图中符号）．
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人体内环境稳态的维持依赖于神经—体液—免疫调节机制信息分子是它们之间发生联系的语言下图是人体内某些信
冬天结了冰的衣服即使在0℃以下的环境中也会直接变干其中发生的物态变化是
升华
熔化
液化
汽化
2.00分在图中ABCDEF分别表示一种物态变化其中发生物态变化时物体都需要吸热冬天呼出的白气属于
2012山东泰安第14题冬天结了冰的衣服即使在0℃以下的环境中也会直接变干其中发生的物态变化是
蒸发
熔化
升华
液化
已知A.B.C.D.E是常见的不同类别的物质C.的水溶液呈蓝色D.是一种红色固体B.→D.的反应过程
二氧化碳气体若被加压降温到一定程度就会填一种物态变化成白色的像雪一样的固体叫干冰夏天从冰箱中取出饮料
如图是教科书上物态变化图．图中ABCDEF分别表示一种物态变化物体发生其中填符号的物态变化时都会放
下图中左图表示人体内血糖调节的部分图解图中ab表示参与血糖调节的两种激素右图表示a激素信息传递的一种
冬天结了冰的衣服即使在0℃以下的环境中也会直接变干其中发生的物态变化是
蒸发
熔化
升华
液化
右图中A.B.C.D.E.F.分别表示六种物质B.C.D.F.分别属于酸碱盐氧化物四种类别中的一种A
右图中A.B.C.D.E.F分别表示常见的六种物质B.C.D.E分别属于酸碱盐氧化物四种类别中的一种
10·天津图ll是水循环示意图图中过程①发生的物态变化是汽化同时伴随着热过程②发生的物态变化是凝华和
小刚吃冰棒时把冰棒放在碗里如图7发现碗中的水越来越多在这个过程中冰棒发生的物态变化是他用手一摸碗壁发
冬天结冰的湿衣服也能晾干如图所示其中发生的物态变化是:
凝华;
升华;
凝固;
液化.
二重感染是指
在药物治疗过程中发生的另一种微生物感染
在药物治疗过程中发生的另一种微生物感染，因使用抗菌药物所诱发
在药物治疗过程中发生的另一种微生物感染，因使用抗菌药物所导致
在一种感染的治疗过程中发生的另一种微生物感染，因使用抗菌药物所诱发
在一种感染的治疗过程中发生的另一种微生物感染，因使用抗菌药物所导致
下图表示在细菌细胞中发生的某些生理过程有关的叙述正确的是D
①→②表示DNA转录，在细胞核中完成
若②中发生了碱基替换则必定发生性状的改变
①②中的A表示同一种核苷酸
②上携带了氨基酸的密码子
在图中ABCDEF分别表示一种物态变化其中发生物态变化时物体都需要吸热冬天呼出的白气属于物态变化以
小刚吃冰糕时把冰糕放在碗里发现碗中的水越来越多在这个过程中冰糕发生的物态变化是他用手一摸碗壁发现碗漏
构思的成果在物态化过程中发生的变化可以概括为和两种情况
小刚吃冰糕时把冰糕放在碗里发现碗中的水越来越多在这个过程中冰糕发生的物态变化是他用手一摸碗壁发现碗漏
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下图是做“探究小车速度随时间变化的规律”的实验中打点计时器打出的纸带．纸带上面每打一点的时间间隔是0.02s且每两个记数点间还有四个计时点未画出．已知记数点之间的距离S1＝1.21cmS2＝2.42cmS3＝3.62cmS4＝4.83cm．则记数点3对应的小车速度v3＝m/s小车运动的加速度a＝m/s2记数点0对应的小车速度v0＝m/s．结果均保留两位有效数字
Peoplewithanimpulsivepersonalityrefertothosewhotendtodothingswithoutconsideringthepossibledangersorproblemsfirst.AccordingtoanewstudybyresearchersattheUniversityofGeorgiasuchpeoplemaybemorelikelytohavefoodaddiction.Thestudyfoundthatpeopleexhibitingimpulsivebehaviorweren'tnecessarilyoverweightbutimpulsivenesswasrelatedtoadirectrelationshipwithfoodandthereforelesshealthyweight.Foodaddictionhasbeencomparedtoaddictivedruguse.Studieshavelinkedthedopamine多巴胺releasethatoccursaftertastingdeliciousfoodtothedopaminereleasethathappenswhenpeopleconsumeotheraddictivesubstances.Impulsivebehaviorinvolvesseveralpersonalitytraits特点.TwoofthesetraitsknownasnegativeurgencyandlackofperseverancewereparticularlyassociatedwithfoodaddictionandhighBMI身体质量指数duringthestudy.Negativeurgencyischaracterizedbythetendencytobehaveimpulsivelywhenexperiencingnegativeemotions.Somepeoplemightdrinkalcoholortakedrugs.Forothersitcouldmeaneatingtofeelbetter.Lackofperseveranceiswhenapersonhasahardtimefinishinghardorboringtasks.Peoplewithalackofperseverancemighthavedifficultyattemptingtochangeaddictiveeatingbehaviorwhichcouldalsocauseobesity.'Impulsivenessmightbeonereasonwhysomepeopleeatinanaddictivewaydespitemotivationtoloseweight'saidDr.AshleyGearhardtaclinicalpsychologist.HewasinvolvedindevelopingtheYaleFoodAddictionScaleinaidofthosepeople.'WearetheorizingthatiffoodaddictionisreallyathingthenourmeasuretheYaleFoodAddictionScaleshouldberelatedtohelpingcontrolimpulsiveaction'saidGearhardt.ClinicalpsychologistDr.JamesMacKillopwhoselabwasconductingthestudybelievesthattherapiesusedtotreataddictivedrugbehaviorcouldhelppeoplewhosufferfromaddictiveeatinghabits.'Mostoftheprogramsforweightlossatthispointfocusonthemostobviousthingswhichareclearlydietandexercise'MacKillopsaid.'Itseemsthatmanagingstrongdesirestoeatwouldnaturallyfitinwiththeskillsapersonwouldneedtoeathealthily.'1AccordingtoParagraph1theresultoffoodaddictionis.A.lesshealthyweightB.motivationtoloseweightC.negativeemotionsD.takingalcoholordrugs2HowdoestheauthorintroducethetwopersonalitytraitsinParagraph4?A.Bymakingcomparisonsandconclusions.B.Byexplainingcausesandeffects.C.Bypresentingquestionsandanswers.D.Bygivingdefinitionsandexamples.3WhatcanbeinferredabouttheYaleFoodAddictionScalefromthetext?A.Ithasbeensuccessfullycarriedoutamongoverweightpeople.B.Itmighthelpsomeimpulsivepeoplewithfoodaddictiontoloseweight.C.Itwillprovewhetherfoodaddictionisaproblemtoimpulsivepeople.D.Itistheoreticallyapropertreatmentforaddictivefoodanddrugbehavior.4Whichofthefollowingcanbethebesttitleforthetext?A.DopaminereleasecausedbyfoodaddictionB.FoodaddictioncomparedtodruguseC.ImpulsivepersonalitylinkedtofoodadditionD.Foodaddictioncontributingtoobesity
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.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.Ialwayshaveadreamtobeafluencyspeaker.ThereforeIamtooshytosayawordinpublic.Whatisjustbeyondmywildestimaginationisfortuneshouldblessmewithachancetorealizemydream.OnedaymyEnglishteacheraskedmetogotoherofficeandtoldusthatIwasgivenanopportunitytoparticipateinanEnglishspeakingcompetition.HearthisIcouldhardlyhidemyexcitement.WhenmakingpreparationforthecompetitionIwritemyspeechheartandsoul.AfterIfinishedthecompositionIdiscusseditwithmyteacherandgotmanyadviceonhowtoimproveit.UnderthehelpofmyEnglishteacherImadeagreatprogress.
在数轴上表示下列各数所代表的点并将其按从小到大的顺序重新排成一列2-0-1.6
已知实数在数轴上的对应点如图所示化简
将下列各数开平方．0.81
如图所示是伽利略的斜面实验下表为某次实验的一组数据．据此他发现＝常数．有同学想验证伽利略的这个结论作出如下四幅图象不合理的是
将下列各数开平方 1
判断无理数是无限不循环小数．判断题
判断无理数包括正无理数零负无理数．判断题
如图所示水平面上有一重40N的物体受到F1＝12N和F2＝6N的水平力作用而保持静止．已知物体与水平面间的动摩擦因数为μ＝0.2求 1此时物体所受的摩擦力多大 2将F1撤去后物体所受的摩擦力为多大 3将F2撤去后物体所受的摩擦力为多大
求下列各式的值．
ImadeanameformyselfwhenIwasabout26.Itnevermeansanything1tomebutofcourseIcan'tsayIamfreefromvanity虚荣.Whenasigningeventwasorganizedformybookatits2saleorwhenIwasinvitedtodeliveraspeechatameetingIwouldbe3andcheerfulespeciallyiftherewerelotsofparticipants.4Ihaveneverbeencontrolledbysuch5forIhavemyownideaofit.Tomean6remainspopularonlyforthreeseconds.Thismorningsomebody7meonthewayandsaid'Ahthat'sZhuDeyong!'Iwasgladtobe8byastrangerandenjoyedmyself'9Iamfamous!'Butsuchenjoyments10onlythreeseconds.Hepassedbyandturnedtothepersonwalkingwithhim'Whatshallwehaveforlunch?'No11ofmeanylonger.ShallI12mylifecherishingthosethreeseconds?Isitnecessarytomakeeffortsto13suchthree﹣secondenjoyments?NoIdon'twantto.Aslifeis14andonlycomesaroundonceitisofgreatvaluetothepersonhimselfbutofnovaluetoothers.Formostpeopleone'snameremains15onlyforthreegenerations:one's16generationthesecondyoursonmaysay'Ahit'smydad.'andthethirdyourgrandsonmaystill17'Ahit'smygrandpa.'Ifamemberofthefourthgenerationisaskedaboutyouhemightbe18'Whoisit?'Ifheisshownapictureofyouhemightgiveitaglanceputitasideand19forgetit.Itamountstonothingmorethana20withanunknownname.1A.impressive B.reasonable C.appropriate D.important2A.unique B.first C.best D.final3A.happy B.upset C.hesitant D.nervous4A.Likewise B.Therefore C.However D.Meanwhile5A.discouragements B.embarrassments C.excitements D.disappointments6A.speech B.name C.book D.event7A.saw B.hit C.patted D.introduced8A.spotted B.recognized C.noticed D.liked9A.Totally B.Aboveall C.Finally D.Afterall10A.maintained B.stayed C.lasted D.remained11A.mind B.idea C.thought D.memory12A.waste B.spare C.devote D.afford13A.reach B.acquire C.offer D.honor14A.easy B.ordinary C.tough D.short15A.welcome B.personal C.respectable D.known16A.past B.own C.future D.new17A.remember B.memorize C.remind D.believe18A.annoyed B.interested C.puzzled D.frightened19A.quickly B.seldom C.deliberately D.otherwise20A.friend B.writer C.grandpa D.stranger
关于速度与加速度的关系下列说法中正确的是
质量m＝20kg的物体静止在水平面上物体与水平面间的滑动摩擦力为40N．现对物体施加一水平推力使物体做匀加速运动测出物体在运动后10s末的速度为8m/s求水平推力的大小．
“叠罗汉”是一种高难度的杂技．由六人叠成的三层静态造型如图所示假设每个人的重力都为G且两脚承受压力相等下面五人弯腰后背部呈水平状态则最底层正中间的人的一只脚对水平地面的压力为
求下列各式的值=
填空．π--2π+12-正整数集{}分数集{}有理数集{}无理数集{}负实数集{}实数集{}
求下列各式字母的取值范围．
爱因斯坦说“伽利略理想斜面实验指出了真正建立动力学基础的线索．”伽利略根据理想斜面实验
求下列各数的立方根．
质量M＝2kg的长木板放在水平光滑的平面上右端放一个质量为m＝6kg的物块在水平拉力F的作用下由静止开始向右运动如图所示已知物块与木板间摩擦因数μ＝0.2最大静摩擦力等于滑动摩擦力g＝10m/s2求 1要保持物块相对木板静止拉力F允许的最大值是多少 2当拉力F＝16N时物块受到的摩擦力多大
求下列各数的立方根．-5
比较大小--
OnMay28th1998Iwasdrivingmy13﹣year﹣olddaughterand14﹣year﹣oldsontoschool.Unfortunatelymycarcrashedwithatruck.Allthreeofuswerecriticallyinjured.Stacey'sbraininjurywasthemostsevere.Despiteallattemptstosavehershediedtwodayslater.WhenIbecameconsciousIheardmyhusbandtalkingtotheorgandonorcoordinator器官捐助协调员.WeknewthatStaceywouldwantthatbecausethat'sthekindofpersonshewas.Shealwayswantedtoassistpeople.Shewasalwayssmilingandbroughtsomuchjoytoothers.Shewasfriendlyandenjoyedwritingstoriesandpoetry.IthasbeenacomforttoknowthatStaceylivesoninthelivesofothers.IhaveevenmetthefamilyofoneofStacey'skidneyrecipients接受人.Thislittlegirlwas6yearsoldatthetimeofthetransplant.ShewassufferingfromNephroticSyndrome.IsawpicturesshowingtheeffectsoftheNephroticSyndromeandthepicturesofherafterthetransplant.Theyalreadyshowedanamazingdifference.Wecorrespondeveryyearthroughletterscardsandpictures.Thegirlisdoingreallywellatschoolandwillbegraduatingfromhighschoolnextyear.Iamsogratefulthatwehavethisrelationship.Ialsofeelrelievedthatmydaughterhasmadesogreatadifferencetoaperson'slife.OvertheyearsIhavehadsomekindofcontactwithalloftherecipientsexcepttheheartrecipient.I'mverysorryforthat.Iwouldlovetohearsomethingfromtheheartrecipient'sfamily.TherearesomanythingsthatIwonderabouther.IwonderifsheisanythinglikeStacey.Doesshesmileallthetime?Doessheenjoywritingstoriesandpoetry?Idohopethattheycancontactus!IfeelguiltybecauseIwastheonedrivingintheaccidentwhichcausedStacey'sdeath.Ialsofeelproudthatmydaughterhashelpedsomanypeople.1WhendidStaceydiefromthetrafficaccident?A.OnMay28th1998B.OnMay29th1998C.OnMay31st1998D.OnMay30th19982Whatdoestheunderlinedword'They'refersto?A.Thepicturestakenafterthetransplant.B.ThepeoplewhoreceivedtheorgansofStacey.C.Thepeoplewhocaredforthegirlinthehospital.D.ThepicturesshowingtheeffectsoftheNephroticSyndrome.3Whatisthewriter'sattitudetowardsherdaughter'sorgandonation?A.GratefulB.DissatisfiedC.ProudD.Guilty4Whathasthewriterbeenlookingforwardtodoing?A.Contactingthekidneyrecipient'sfamily.B.Visitingkidneyrecipient'sfamily.C.Gettingpaidfromtheheartfamily.D.Seeingtheheartrecipient.
摄氏温度是把的温度规定为100℃把的温度规定为零摄氏度如图所示是体温计和寒暑表的一部分其中图是寒暑表甲乙两表分度值较小精确度较高的是．甲乙两温度计的示数分别为℃和℃．
关于速度和加速度的关系下列说法中正确的是
在做“探究匀变速直线运动”实验时 1要用到打点计时器关于打点计时器及其操作下列说法正确的是不定项 A．打点计时器是一种计时仪器使用电源的频率为50Hz每隔0.02秒打一次点 B．电磁打点计时器的工作电压是4﹣6V的交流或直流电而电火花打点计时器的工作电压是220V交流电 C．实验操作时是先接通打点计时器然后让物体带动纸带运动 D．实验操作时是让物体带动纸带运动的同时接通打点计时器 2某同学打出的纸带如下图图中上面的数字为相邻两点间的距离纸带上两相邻计数点的时间间隔为T＝0.10s试求计算结果数值保留到小数点后面第二位 ①打第5个计数点时纸带的速度v5＝m/s． ②0﹣6点间的加速度为a＝m/s2．
求下列各式的值．-=
下列说法正确的是
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