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Plans to bring wild tigers back to their original home , their historical range(历史分布范围) in the IliB...
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高一下学期英语《》真题及答案
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Runninglikethewindroaring咆哮likethundertigershavelo
【2011·江西鹰潭市第二次模拟】Runninglikethewindroaringlikethun
Runninglikethewindroaring咆哮likethundertigershavelo
Runninglikethewindroaring咆哮likethundertigershavelo
Runninglikethewindroaring咆哮likethundertigershavelo
Runninglikethewindroaringlikethundertigershavelong
Tigersarestronganddangerousanimals.Butnowtheyarein
Morewildtigershavebeenseenintheforestaroundthisare
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SavetheWildTigerWhenpeoplethinkoftigerstheythink:s
Runninglikethewindroaring咆哮likethundertigershavelo
OnagrassyplaininSouthAfricathousandsofmilesfromhom
Runninglikethewindroaring咆哮likethundertigershavelo
Runninglikethewindroaring咆哮likethundertigershavelo
Wildanimals________tigersandpandasarebecomingrarE.
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Tigersarestronganddangerousanimals.Butnowtheyarein
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阅读下面的材料根据材料的内容选择正确答案填空Tigersarestronganddangerousa
Runninglikethewindroaring咆哮likethundertigershavelo
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某种电镀污泥主要含有碲化亚铜Cu2Te三氧化二铬Cr2O3以及少量的金Au可以用于制取Na2Cr2O7溶液金属铜和粗碲等以实现有害废料的资源化利用工艺流程如图 已知煅烧时Cu2Te发生的反应为Cu2Te+2O22CuO+TeO2． 1煅烧时Cr2O3发生反应的化学方程式为． 2浸出液中除了含有TeOSO4在电解过程中不反应外还可能含有填化学式． 3工业上用重铬酸钠Na2Cr2O7母液生产重铬酸钾K2Cr2O7的工艺流程如图所示 通过冷却结晶能析出大量K2Cr2O7的原因是． 4测定产品中K2Cr2O7含量的方法如下称取产品试样2.50g配成250mL溶液用移液管取出25.00mL于锥形瓶中加入足量稀硫酸酸化后再加入几滴指示剂用0.1000mol•L﹣1硫酸亚铁铵NH42FeSO42标准液进行滴定重复进行二次实验．已知Cr2O72﹣被还原为Cr3+ ①氧化还原滴定过程中的离子方程式为． ②若三次实验消耗NH42FeSO42标准液的平均体积为25.00mL则所得产品中K2Cr2O7的纯度为%．[已知MK2Cr2O7＝294g•mol﹣1计算结果保留三位有效数字]． 5上述流程中K2Cr2O7发生氧化还原反应后所得溶液中除含有Cr3+外还含有一定浓度的Fe3+杂质可通过加碱调pH的方法使两者转化为沉淀．已知cCr3+＝3×10﹣5mol•L﹣1则当溶液中开始析出CrOH3沉淀时Fe3+是否沉淀完全填“是”或“否”．{已知Ksp[FeOH3]＝4.0×10﹣38Ksp[CrOH3]＝6.0×10﹣31}
H是合成抗炎药洛索洛芬钠的关键中间体它的一种合成路线如下 回答下列问题 1A的名称是H中官能团名称是 2反应①的反应条件为 3反应⑥的化学方程式为反应类型为． 4反应⑦除生成H外还生成了另一种有机产物的结构简式为． 5符合下列条件的G的同分异构体有种． I．能发生银镜反应Ⅱ苯环上一氯取代物只有一种Ⅲ核磁共振氢谱有4组峰 6仿照H的合成路线设计一种由B合成的合成路线．
如图长为l的细绳下方悬挂一小球a绳的另一端固定在天花板上O点处在O点正下方l的O′处有一固定细铁钉．将小球向右拉开使细绳与竖直方向成一小角度约为2°后由静止释放并从释放时开始计时．当小球a摆至最低位置时细绳会受到铁钉的阻挡．设小球相对于其平衡位置的水平位移为x向右为正．下列图象中能描述小球在开始一个周期内的x﹣t关系的是
DoyouwanttodosomevolunteerworkwhileexploringAfricaThenjoininour21﹣DayFlagshipProgram．StepontotheflatsandylandofGhanaandyou'llimmediatelyhearthelaughterofchildreneverywhere．ThislaughterwillbetheconstantofyourtripandasteadysourceofenergywhileyouvolunteeramongoneofAfricaskindcommunities． CommunityService VolunteerinprimaryschoolsworkingwithchildrenofdifferentagestohelpimprovetheirEnglishskillstutorthosewhomightbefallingbehindandcontributetoeachschool'sneedsincludingmakingimprovementstothefacilities．Splityourtimebetweenteachingandcampusrefurbishment翻修projectstoserveeveryaspectoftheschoolandlearnallabouteducationinGhana． Hands﹣onLearning Participateinworkshopssuchasbatikclothdyeing蜡染drummingdancingandcrashcoursesinthenativelanguageEweorKrobo．You'llbegivenaGhanaiannamebythelocalchiefofyourvillageandvisitaseamstress女裁缝tohavecustomclothingmadeoutofcolorfulfabricsyoupurchase．Onthe21﹣DayFlagshipProgramyou'llhearaboutthenation'shistoryasacenteroftheslavetradeandvisitFortPrinzensteintotrulyunderstandtheweightofthistopic． Adventure You'llalsoexperiencethenaturalsurroundingsofGhanawithabeautifulwaterfallhikeOnyour21﹣DayFlagshipProgramgoonatwo﹣nighttripwhereyou'llgettovisitamonkeyshelter． Lodging GlobalLeadershipAdventuresGLAoperatestwoHomeBasesforthe21﹣dayprogram．BotharelocatedoutsideofthecapitalcityofAccrainruralvillagesettings．Accommodationsarebasicbutcleanandsafe．Studentssleepinroomswithroommatesandhaveaccesstosharedbathroomswithcold﹣watershowers． Dates June26﹣July162019 July9﹣July292019 July20﹣August92019 Duration21days Tuition﹩5399 CommunityServiceHours60 Formoreinformationpleasecall1﹣858﹣771﹣0645orsendanemailtoinfo@experiencegla．com． 1WhichofthefollowingisarequirementforparticipantsA A．BeingabletospeakEnglishwell． B．Beingstrongandover18yearsold． C．KnowingalotabouteducationinGhana． D．Havingdonesimilarvolunteerworkbefore． 2WhatcanbedoneatFortPrinzensteinC A．Learningtoplaydrums． B．Visitingacustomclothingfactory． C．Learningaboutthenation'spasthistory． D．ChoosingaGhanaiannameforyourself． 3WhatwouldparticipantshavetodowhenjoiningintheprogramA A．StayinGhanaforthreeweeks． B．Accompanymonkeysfortwonights． C．Pay5399dollarsforthewaterfallhike． D．Dovolunteerworkforatmost40hours．
某产品的广告费用x与销售额y的统计数据如表 根据上表中的数据可求得线性回归方程＝x+中的为6.6据此模型则当销售额为66.2万元时预报广告费用为
如图是新型镁﹣锂双离子二次电池下列关于该电池的说法不正确的是
下列各项中的实验方案不能达到预期实验目的是
高锰酸钾是常用的氧化剂．某化学小组在实验室以软锰矿主要成分是MnO2为原料制备KMnO4如图是实验室制备高锰酸钾的操作流程． 已知 请回答 1反应①的化学方程式为加热软锰矿KClO3和KOH固体除三脚架玻璃棒泥三角和铁坩埚外还用到的仪器有不采用瓷坩埚而选用铁坩埚的理由是． 2反应②中氧化产物与还原产物的物质的量之比为上述流程中可以循环利用的物质是． 3实验时从滤液中得到KMnO4晶体的实验操作a为CO2过量会生成KHCO3导致得到的KMnO4产品的纯度降低其原因是．
某次高二数学联考测试中学生的成绩X服从正态分布100σ2σ＞0若X在85115内的概率为0.75任意选取一名学生则该生数学成绩高于115的概率为．
已知函数fx＝lnx﹣+a在x∈[1e]上有两个零点则a的取值范围是
下列说法合理的是
下列实验中所使用的装置夹持装置略试剂和操作方法都正确的是
甲乙丙丁四名同学报名参加假期社区服务活动社区服务活动共有关怀老人环境监测教育咨询交通宣传等四个项目每人限报其中一项记事件A为“4名同学所报项目各不相同”事件B为“只有甲同学一人报关怀老人项目”则PA|B的值为
Afewpeoplehavelucid清醒的dreamsin1whichthedreamerisawarethey'redreamingandcancontroltheexperience．Someotherscanlearn2tohavehaveluciddreams．Thepracticecanbeusedtodealwithfrighteningdreams．Howeveritspotentialhasbeenlimitedbyitoften3beingbesohardtoachieve．Nowresearchershavedevelopedthemosteffectivemethodyetforpromotingluciddreams． Theresearcherslet121adultsaged19to75picksomething4seenseeinapreviousdream．Itwascalledadreamsignthatcanserve5asaremindertobecomelucidwhenmetagain．The6volunteersvolunteerwerethenhandedcapsules．Eachpersongotahigh﹣dose大剂量的capsulealow﹣dosecapsuleandaplacebo无效对照剂capsulebuttheycouldn'ttellwhichwaswhich．Onthreeoccasionstheywokein7themiddleofthenighttookacapsuleimaginedtheirdreamsignandwentbacktosleep．Thehighdosewasmosteffectivecausingluciddreamsin42percentofparticipants．About27percent8reportedreportluciddreamswiththelowdoseand14percentaftertakingtheplacebocapsule． Thepotentialapplicationsare9excitingexcite．Thisnewmethodhasthesuccessrateweneedtobeableto10properlyproperdoresearchonluciddreamingsaysDenholmAspyattheUniversityofAdelaideinAustralia．
Throughoutmuchofhumanhistorymanhasbeenthemeasureofmanyifnotallthings．Lengthsweredividedupintofeetandsmallerunitsfromthehumanhand．Othermeasureswereequallycharacteristic．Mediterraneantradersforcenturiesusedtheweightofgrainsofwheattodefine定义theirunitsofmass．TheRomansusedlibraforerunnerofthepoundbyreferringtotheweightofacarob角豆树seed． Thesizesofsimilarlynamedunitscouldalsodiffer．Theking'sfootusedinFrancefornearly1000yearsafteritsintroductionbyCharlemagneinaround790ADwasat32.5cmaroundacentimetershorterthantheBelgicfootusedinEnglanduntil1300．GreekEgyptianandBabylonianversionsofwaterinafixedcontainervariedfromoneanotherbyafewkilosNorwasthereagreementonsuchthingswithincountries．InFrancewheretherewasnounified统一的measurementsystematthenationallevelthesituationwasparticularlyterrible．Thelieueformermeasureofdistanceforexamplevariedfromjustover3kminthenorthtonearly6kminthesouth． AlthoughJohnWilkinsanEnglishmanfirstputforwardadecimalsystem十进制ofmeasurementin1668itwastheFrenchwhoin1799madeitlaw．TheSystèmeInternationald'UnitésSIorthemetricsystemasitisbetterknowndevelopedfromitandbecametheofficialmeasurementinallcountriesexceptMyanmarLiberiaandtheUnitedStates．NowtheInternationalBureauofWeightsandMeasuresinParisissettogivethemetricsystemitsbiggestshake﹣upyet． AtameetinginVersaillesFranceonNovember16th2018theworld'smeasurementbodiesarealmostcertaintoapproveadecisionthatwillmeanfouroutofthesevenbaseSIunitsincludingthekilogramwillfollowtheotherthreeincludingthemetreinbeingredefinedintermsofthevaluesofphysicalconstants物理常数．EachofthechosenconstantshasbeenmeasuredincrediblypreciselywhichwouldmeanthatfromMay20th2019theconstantswillthemselvesbefixedattheircurrentvaluesforever．Anylaboratoryintheworldwillthenbeabletomeasureforexamplethemassofanobjectaspreciselyastheaccuracyoftheirequipmentwillallow． 1WhatdoesParagraph1mainlytellusB A．Poundwentbeforelibrainmeasurement． B．Differentthingsusedtobeadoptedasmeasures． C．GrainswereacceptedasmeasuresbytheRomans． D．Fixedmeasurementsystemsweregraduallyformed． 2HowdoestheauthordevelopthesecondparagraphD A．Intimeorder． B．Byanalysis． C．Inspaceorder． D．Bycomparison． 3WhichofthefollowingcountriesusedSIasanofficialmeasurementA A．France． B．Liberia． C．America． D．Myanmar． 4Whatwilltheworld'smeasurementbodiesachieveatthemeetingheldinVersaillesC A．TheywillcomeupwithsevennewSIunits． B．TheywillsetMay20thasanewinternationalfestival． C．TheywillredefinefourSIunitsincludingthekilogram． D．Theywilldecideonanewmeasureusedinthelaboratory．
POCl3是重要的基础化工原料广泛用于制药染料表面活性剂等行业．一种制备POCl3的原理为PCl3+Cl2+SO2＝POCl3+SOCl2．某化学学习小组拟利用如图装置在实验室模拟制备POCl3．有关物质的部分性质如表 1仪器甲的名称为与自来水进水管连接的接口编号是．填“a”或“b”． 2装置C的作用是乙中试剂的名称为． 3该装置有一处缺陷解决的方法是在现有装置中再添加一个装置该装置中应装入的试剂为写名称．若无该装置则可能会有什么后果请用化学方程式进行说明． 4D中反应温度控制在60﹣65℃其原因是． 5测定POCl3含量．①准确称取30.70gPOCl3产品置于盛有60.00mL蒸馏水的水解瓶中摇动至完全水解②将水解液配成100.00mL溶液取10.00mL溶液于锥形瓶中③加入10.00mL3.200mol/LAgNO3标准溶液并加入少许硝基苯用力摇动使沉淀表面被有机物覆盖④以Fe3+为指示剂用0.2000mol/LKSCN溶液滴定过量的AgNO3溶液达到滴定终点时共用去10.00mLKSCN溶液． ①滴定终点的现象为用硝基苯覆盖沉淀的目的是． ②反应中POCl3的百分含量为．
已知XYZWR是原子序数依次增大的短周期主族元素X是周期表中原子半径最小的元素Y元素的最高正价与最低负价绝对值相等Z的核电荷数是Y的2倍W最外层电子数是最内层电子数的3倍．下列说法不正确的是
M的名称是乙烯雌酚它是一种激素类药物结构简式如下．下列叙述不正确的是
下列实验的“现象”或“结论或解释”不正确的是
已知圆Cx+32+y2＝100和点B30P是圆上一点线段BP的垂直平分线交CP于M点则M点的轨迹方程是
下列有关实验操作现象和解释或结论都正确的是
用反证法证明命题“已知xy∈N*如果xy可被7整除那么xy至少有一个能被7整除”时假设的内容是
下列离子方程式书写正确的是
设NA为阿伏加德罗常数的值下列叙述正确的是
我国南宋数学家杨辉所著的详解九章算法一书中记录了一个由正整数构成的三角形数表我们通常称之为杨辉三角．以下数表的构造思路就来源于杨辉三角． 从第二行起每一行中的数字均等于其“肩上”两数之和表中最后一行仅有一个数a则a的值为
Helpfultipsforcollege﹣boundseniors Researchingacollegeisoneofthemosttime﹣consumingtasksthatyou'llencounter．1DForexamplewhatclassesandfacilitiesthecollegehastoofferandwhatsportsitoffers．Afternarrowingyourchoicestoagroupofcollegesyou'llhavetostarttoresearchtheseindepth．2GHeorshemaybeabletohelpyoufindthingsaboutthecollegesthatyoucouldnotgetyourself． Knowingwhatyouwanttostudyisanotherkeytolookingforacollege．3FByknowingwhatIwanttodoIcanthenlookatcollegesthatI'vebeenthinkingaboutapplyingtoandnarrowmychoicesdown．Ifacollegedoesn'thavethecoursesIneedthenit'sdefinitelyoutofthepicture． Anotherkeythingtolookforisthecollege'stestingrequirements．4ASomecollegesalsorequireanSATIItestincertainareasforexampleEnglishorMath．Remembertolookatacollege'sGPArequirementstoo．Youmayfindacollegewherethere'severythingyouwantbutyourGPAisn'thighenoughtobeconsidered．Inthiscaseyoumayneedtoattendajuniorcollegeforoneortwoyears． 5BAtthispointyoumaywanttohavealongdiscussionwithyourparentsandfindouthowmuchthey'rewillingandabletospendoncollege．Ifitisn'tenoughtocoveryourfulltuitionthenyoumaywanttoapplyforfinancialaidorascholarship．Andyourfinaloptionmaybelookingforacollegethatdoesn'tcostasmuch． A．AllcollegesrequireanSAToranACTtest． B．Andlastlybutdefinitelynottheleastistuition． C．Lookforacollegenowifyouplanonattendingone． D．Youneedtofindoutmanybasicsaboutpossiblecolleges． E．Ifyouwillbeaseniorinthenearfuturethisarticleisforyou． F．Iplantomajorinbusinessmanagementandminorincomputerapplications． G．Ifyouhaveacollegecounseloratyourschoolthiswouldbeagoodtimetoaskforadvice．
下列离子或分子组中能大量共存且满足相应要求的是
NA是阿伏伽德罗常数的值．下列说法正确的是
某有机物F在自身免疫性疾病的治疗中有着重要的应用工业上以乙烯和芳香族化合物B为基本原料制备F的路线图如下 已知 1乙烯生成A的原子利用率为100%则X是填化学式F中含氧官能团的名称为． 2E→F的反应类型为B的结构简式为若E的名称为咖啡酸则F的名称是． 3写出D与NaOH溶液反应的化学方程式． 4E有多种同分异构体符合下列条件的同分异构体有种其中核磁共振氢谱有6个峰的物质的结构简式为． ①能发生水解反应银镜反应且1mol该物质最多可还原出4molAg ②遇FeCl3溶液发生显色反应 ③分子中没有甲基且苯环上有2个取代基 5以乙烯为基本原料设计合成路线合成2﹣丁烯酸写出合成路线其他试剂任选．
已知抛物线Cy2＝4x的焦点为F直线ly＝kx﹣1与抛物线C交于AB两点若＝3则|AB|＝．
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