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PM2.5是衡量空气污染程度的一个指标，为了了解A市空气质量情况，从2018年每天的PM2.5值的数据中随机抽取40天的数据，其频率分布直方图如图所示．将PM2.5值划分成区间[0，100）、[10...
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高三下学期数学《》真题及答案
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一下物质不作为空气污染物计入环境空气质量标准基本监测的是
CO
2
SO
2
CO
PM
10
、PM
2.5
以下是空气污染指数与质量级别质量状况的对应关系赣州市10月某天的空气污染指数为48首要污染物为可吸入
Ⅰ 优
Ⅱ 良
Ⅲ（2）轻度污染
Ⅴ 重度污染
以下物质不作为空气污染物计入环境空气质量标准基本监测项目的是
CO
2
SO
2
CO
PM10、PM2.5
根据环境空气质量标准GB3095-2012环境空气污染物基本项目不包括
CO
TSP
PM
PM
PM2.5是衡量空气污染程度的一个指标为了了解A市空气质量情况从2018年每天的PM2.5值的数据
根据环境空气质量标准GB3095-2012环境空气污染物基本项目不包括
CO
TSP
PM10
PM2.5
2017年根据环境空气质量标准关于环境空气污染物项目分类的说法正确的是
TSP、PM10、PM2.5属于环境空气污染物基本项目
BaP、氟化物属于环境空气污染物其他项目
NO2、NOx属于环境空气污染物其他项目
CO、O3属于环境空气污染物基本项目
PM2.5是衡量空气污染程度的一个指标为了了解A市空气质量情况从2018年每天的PM2.5值的数据
根据环境空气质量标准GB3095—2012环境空气污染物基本项目不包括______
CO
TSP
PM10
PM
2.5
空气污染指数简称API就是将常规监测的几种空气污染物浓度简化成单一的数值形式并分级表示空气污染程度和
二氧化碳
二氧化硫
可吸入颗粒物
臭氧
下列污染物中属于环境空气质量标准规定的环境空气污染物基本项 目的有
TSP
PM10
NO2
NOx
2013年12月以来我国25个省份104多座大中城市不同程度出现雾霾天气空气质量达到重度污染重庆市
氮气
二氧化硫
一氧化碳
可吸入颗粒物
指室内空气污染物颗粒状或气体状的聚集程度及范围是衡量室内空气对人体影响的重要指标
法国的蓝天白云常令不少中国游客欣羡不已但法国卫生监测所发布的公报显示2004年至2006年巴黎马赛和
空气质量污染程度分级方法
法国空气中PM2.5超标原因
法国如何应对空气污染
空气污染对法国民众健康造成的影响
假如你是招远市的环保局长为提高招远的空气质量拟给市民一个承诺要在报告里列出控制空气污染的措施从化学专
2013年冬天郑州市出现连续多日的雾霾天气为了提高郑州市的空气质量作为中学生你对防治空气污染能提出那
根据环境空气质量标准关于环境空气污染物项目分类的说法正确的是
TSP、PM10、PM2.5属于环境空气污染物基本项目
BAP、氟化物属于环境空气污染物其他项目
N02、NOx属于环境空气污染物其他项目
CO、O3属于环境空气污染物基本项目
N2浓度是衡量空气新鲜程度和受污染程度的一个间接指标
空气污染指数AirPollutionIndex简称API就是将常规监测的几种空气污染物浓度简化成单一
可吸入颗粒物
二氧化硫
二氧化碳
臭氧
下面是国家气象局提供的全国部分城市某天的空气污染指数其中空气质量良好的是哪一个城市
天津---空气污染指数为132
石家庄---空气污染指数是160
青岛---空气污染指数是92
太原---空气污染指数是260
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JournalofEnergyChemistry报导我国科学家设计CO2熔盐捕获与转化装置如图．下列有关说法正确的是
The65﹣year﹣oldSteveGoodwinwasfoundsufferingfromearlyAlzheimer's阿尔兹海默症Hewaslosinghismemory. AsoftwareengineerbyprofessionStevewasakeenloverofthepianoandtheonlymusicianinhisfamily.Musicwashistruepassionthoughbehadneverperformedoutsidethefamily. Melissahisdaughterfeltitmorethanworthwhiletosavehismusictowhichshefellasleepeachnightwhenshewasyoung.Shethoughtabouthiringaprofessionalpianisttoworkwithherfather. NaomiMelissa'sbestfriendandatalentedpianistgottoknowaboutthisandshowedwillingnesstohelp. Whydothis?Stevewondered. Becauseshecares.Melissasaid. Stevenoddedtearineye. NaomidrovetotheGoodwinhomeshetoldSteveshe'dlovetohearhimplay.Stevemovedtothepianoandsatatthebenchhandstremblingashegentlyplacedhisfingersonthekeys. Naomiputasmallrecordernearthepiano.Startsandstopsandmistakes.Longpausesheartsinking.ButStevepressedonplayingforthefirsttimeinhislifeforastranger. ItwasbeautifulNaomisaidafterlisteningtotherecording.Themusicwasworthsaving. Herresponsibilityherprivilegewouldbetorescueit.ThemusicwasstillinSteveGoodwin.Itwasbiddeninroomswithdoorsabouttobelocked. NaomiandStevemeteveryotherweekandspenthourstogether.He'dmovehisfingersclumsilyonthepianoandthenshe'dtakehisplace.Hestruggledtoexplainwhatheheardinhishead.Hestoodbythepianoeyesclosedlisteningforthefirsttimetohisownworkbeingplayedbysomeoneelse. SteveandNaomispokeinmusicalcode:linesbeatsintervalsmovingfromtheroottoendasonginanewkey.Steveheardit.Allofit.Hejustcouldn'tplayit. WorkingwithNaomididwondersforSteve.Ithadexcitedwithinhimthebeliefhecouldwriteonelastsong.OnedayNaomireceivedanemail.Attachedwasarecordingarecordingoflossandloveofthefight.StevecalleditMelancholyFlower. NaomiheardmultiplestopsandstartsStevestrugglingsearchingwhilehiswifeJonicalledhimhoneyandencouragedhim.ThetaskwassohardandSteveangryandupsetsaidhewasquitting.Jonipraisedhimtellingherhusbandthiscouldbehissignaturepiece. Naomimanagedtofigureout16ofSteve'sfavoriteandmostpersonalsongs.WithNaomi'shelptheGoodwinfamilyfoundasoundengineertorecordNaomiplayingSteve'sgongs.Jonithoughtthatwouldbetheend.Butitwasn't. Inthemonthsleadinguptothe2016OregonRepertorySingersChristmasconcertNaomitoldthedirectorshehadaspecialoneinmind:MelancholyFlower. ShetoldthedirectoraboutherprojectwithSteve.Thedirectoragreedtoaddittotheplayinglist.ButNaomiwouldhavetoaskSteve'spermission.Heconsidereditanhonor. AftertheconcertNaomitoldthefamilythatSteve'smusicwasbeautifulandprofessional.Itneededtobesharedinpublic. ThefamilyrentedaformerchurchindowntownPortlandandscheduledaconcert.Bythedayoftheshowmorethan300peoplehadsaidtheywouldattend. BythenStevewashavingahardtimerememberingthenamesofsomeofhisfriends.Heknewthepathhislifewasnowtaking.Hetoldhisfamilyhewasatpeace. Stevearrivedandsatinthefrontrowsurroundedbyhisfamily.Thehouselightsfaded.Naomitookthestage.Herfingers.Hisheart. 1WhydidMelissawanttosaveherfather'smusic? A.Hismusiccouldstophisdiseasefromworsening. B.Shewantedtopleaseherdyingoldfather. C.Hismusicdeservedtobepreservedinthefamily. D.Shewantedtomakeherfatheraprofessional. 2AfterhearingSteve'splayingNaomi. A.refusedtomakeacommentonit B.wasdeeplyimpressedbyhismusic C.decidedtofreeStevefromsuffering D.regrettedofferinghelptoherfriend 3HowcantheprocessofSteve'srecordingbedescribed? A.Itwasslowbutproductive. B.Itwasbeneficialtohishealth. C.ItwastiresomeforNaomi. D.ItwasvitalforNaomi'scareer. 4BeforeStevefinishedMelancholyFlowerhiswifeJoni. A.thoughtthemusictalentofStevewasexhausted B.didn'texpectthedamagethediseasebroughtabout C.didn'tfullyrealizethevalueofherhusband'smusic D.broughtherhusband'smusiccareertoperfection 5HowdidStevefeelattheconcertheldindowntownPortland? A.Hefeltconcernedabouthisillness. B.Hesensedaresponsibilityformusic. C.Heregainedhisfaithinmusic. D.Hegotintoastateofquiet. 6Whatcanbeasuitabletitleforthepassage? A.TheKindnessofFriends B.ThePowerofMusic C.TheMakingofaMusician D.TheValueofDetermination
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假定你是王鹏你的美国朋友John对茶感兴趣.请你用英语给他写一封邮件诚邀他参加2019年5月3日﹣5月6日在宁波举办的第十届国际茶文化节the10thInternationalTeaCultureFestival并简要介绍你对茶的认识和了解. 注意:1.词数100左右; 2.可以适当增加细节以使行文连贯. DearJohn Yours WangPeng
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设NA为阿伏加德罗常数的值．下列有关叙述正确的是
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环之间共用一个碳原子的化合物称为环化合物螺[33]庚烷是其中的一种．下列有关说法正确的是
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NA是阿伏伽德罗常数的值．下列关于反应“C+2H2SO4浓CO2↑+2SO2↑+2H2O”的说法正确的是
ResearchersfromTuftsUniversityinMassachusettsinspectedlunchesbelongingtoabout600studentsat12differentschoolsinthestate.Theresearcherssaidtheywereastonishedthatchildrenwhobringlunchfromhomeeatfewerfruitsandvegetablesmorepackagedfoodsandmorecaloriesthanthosewhotakepartinaschoollunchprogram. SchoolcafeteriasintheUnitedStatesmustfollowtheguidelinessetoutbytheNationalSchoolLunchProgramNSLPagovernmentservicethatprovideslow﹣costorfreelunchestostudents.Theguidelinesrequireschoolstoservemorefruitvegetableswholegrainsandlow﹣fatproducts.Schoolsmustalsolimittheamountsoffatsaltandsugarinthefoodtheyserve. TheresearchersfoundthatnoneofthepackedlunchestheyexaminedmetalloftherequirementsontheNSLPlist.Onlytwenty﹣sevenpercentofthepackedlunchesmetatleastthreeoftherequirements.Ninety﹣fivepercentofalllunchesdidnotcontainaservingofvegetables.Oneinfourlunchesdidnotincludeamainfooditem.SinceaboutfortypercentofAmericanschoolchildrenbringtheirlunchunhealthyfoodintheirlunchboxescouldhaveseriousconsequences.Servingnutritiousfoodtochildrennotonlykeepsthemhealthybutalsohelpstoestablishgoodeatinghabits. UnfortunatelysincetheUSgovernmentpassedthelawsrequiringschoolstoservehealthiermealsthenumberofchildrenbuyingschoolluncheshasdroppedbynearlyfourpercent.SchoolmealscontainsomanythingsthatIdislikestudentswhoprefertoeathome﹣packedlunchessaid.InCanadaonlytentofifteenpercentofschoolchildrenhaveaccesstoschoolmeals.Therearenonationalrulesforhealthyschoollunchesbutmostprovinceshaveestablishedtheirownguidelines. JeanneGoldbergtheprofessorwholeadsthestudyinMassachusettssaysparentsusuallyconsiderthecostandconvenienceoflunchfoodsaswellaswhattheirchildrenactuallylike.Unfortunatelythesefactorsarenotalwaysinharmonywithgoodnutritionsheadds.What'smoresheemphasizesthatthefindingsnotonlyhelpparentsfindlunchoptionsthatareconvenientaffordableandhealthybutalsoencouragechildrentochoosethoseoptions. 1Whatdidtheresearchersfindoutaboutstudents'lunches? A.Studentswhoeathome﹣packedlunchesseemtobehealthier. B.ThemajorityofAmericanstudentsprefertoeathome﹣packedlunches. C.Home﹣packedlunchesarelessnutritiousthanmealsprovidedbyschools. D.Lunchesprovidedbyschoolscan'tmeetthestandardssetoutbythegovernment. 2Whatcontributestofewerchildrenchoosingschoollunches? A.Thepriceoftheschoollunchesisincreasing. B.Theythinktheschoollunchesarelessdelicious. C.Parentsworryaboutthepoorqualityofschoollunches. D.Thereareonlylimitedtypesofmealsprovidebyschools. 3WhatcanwelearnfromJeanne'swordsinthelastparagraph? A.Studentsshouldbeforcedtoeatschoollunches. B.Children'spreferencetofoodsistheonlystandardforparents. C.Thefindingshaveconvincedmorestudentstotakepartinschoollunchprograms. D.Parents'choicesofhome﹣packedlunchesfailtosatisfytheirchildren'srealneeds. 4What'sthewriter'spurposeofwritingthispassage? A.Toshowthestudyresultsofhome﹣packedlunches. B.Tointroducesomemoredeliciousfoodtostudents. C.Toanalyzethedisadvantagesofhome﹣packedlunches. D.Toadviseparentstopreparevarioushome﹣packedlunches.
IhadasmuchfunsailingtheseasasInowdowithstudents. A.working B.work C.towork D.worked
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?ChrisandTimofferedusthe18:humanbeingstookitforgrantedthattheir19heldallthesolutionsbutmaybetheirheartscanbeabetter20. 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
二醚水蒸气重整制氢过程涉及的主要反应如下 ⅠCH3OCH3g+H2Og═2CH3OHg△H＝+23.6kJ•mol﹣1 ⅡCH3OHg+H2Og═CO2g+3H2g△H＝+49.5kJ•mol﹣1 ⅢCH3OHg═COg+2H2g△H＝+90.7kJ•mol﹣1 ⅣH2Og+COg＝CO2g+H2g△H＝﹣41.2kJ•mol﹣1 各反应平衡常数与温度变化关系如下表 1重整反应CH3OCH3g+3H2Og═2CO2g+6H2g△H＝xkJ•mol﹣1回答下列问题 ①x＝ ②有利于提高重整反应中CH3OCH3平衡转化率的条件为填标号． A．高温低压B．低温__C．高温__D．低温低压 ③若在恒温刚性容器中进行重整反应达到平衡时[CH3OCH3]＝10ml•L﹣1[H2O]＝0.2mol•L﹣1[H2]＝10mol•L﹣1[CO2]＝40mol•L﹣1则反应温度约为． ④723K时v＝k•[cCH3OCH3]2•[cCO2]﹣1.5为重整反应速率方程．在相同条件下cCO2分别为abc时H2产率随时间的变化关系如图1则abc由小到大的顺序为． 2CO会造成燃料电池催化剂中毒重整反应体系中CO体积分数随水醚比与温度的变化关系如图2． ①相同温度下水醚比为时CO体积分数最高． ②实际生产中选择反应温度为250℃的原因为选择水醚比为3～6的原因为．
FrostValleyYMCAisavalues﹣drivenorganizationthatencouragesyouthdevelopmenthealthylivingandsocialresponsibilitythroughoutdooreducationalandrecreationalprogramsforall.Thisaimisguidedbyoureightcorevalueswhichserveaspathwaysforourguestsastheybondwithnatureandeachother.Theyare:CaringCommunityDiversityHonestyInclusivenessRespectResponsibilityandDevotion.Learnmoreaboutourwonderfulprograms. Weoffer: BearGryllsSurvivalAcademyCamp﹣Doyouhavewhatittakestosurviveinthewilderness?Findoutintheworld'sfirstBearGryllsSurvivalCampforkids!Searchforfoodbuildshelterslearndynamicself﹣rescueandmuchmore! Counselor﹣in﹣TrainingPrograms﹣Isyourteenreadyformoreresponsibilityandtheindependenceofcollegeand/orapart﹣timejob.OurCiTslearnleadershipskillstogainresponsibilitywhilealsoparticipatinginthecharacter﹣buildingwholesomeactivitiesthatmakesummercampsospecial. MainstreamingatCamp﹣InpartnershipwiththeYoungAdultInstitutecamperswithdiverseabilitiesareacceptedinthetraditionalcampsettingalongsidetheirpartnersinanenvironmentthatencouragesgrowthforall. ClarkeSchoolPartnership﹣InpartnershipwiththeClarkeschoolcamperswithhearinglosswhocommunicateorallyarewelcomedintothecampcommunityforatraditionalcampopportunitywhereallchildrencangrowtogether. Callustodaytospeakwithourregistrarsaboutthebestfitforyourchildorteentoday!845﹣985﹣2291ext.203oremailcampregistrationfrostvalley.org. 1WhatisFrostValleyYMCAaimedat? A.Inspireyouthgrowthhealthylifestyleandresponsibility. B.Learnaboutcultures. C.Experienceatraditionalcamp. D.Helpbuildthecharacterofleadership. 2Whichcampwillyouchooseifyouwanttolearntosurviveinthewild? A.ClarkeSchoolPartnership. B.Counselor﹣in﹣TrainingPrograms. C.MainstreamingatCamp. D.BearGryllsSurvivalAcademyCamp. 3Fromwhichisthetextprobablytaken? A.Ayouthmagazine. B.Acampwebsite. C.Atravelbrochure. D.Aneducationalnewspaper.
Therearealwaysthosetimeswhenthere'ssomeoneannoyingusoverandover.1Evenwhenwecanbreakitoffweneedtodoitinawaythatwon'tcausetheirangertomakethingsevenworse.Handlingpeoplewedon'tlikerequiresthatwebothbesensitivetoourownneedsandthoseofthepeoplearoundus. 1.Don'treact. Oftenpeoplewillbotheryoutogetareaction.Trytoavoidblowinguporexpressingyourdiscontentnon﹣verbally.2Ordon'tmutter嘟囔thingsunderyourbreathorelseyoumightfeedthefire.Rememberthatsilencedoesnotmakeyouweak. 3Thinkaboutthebigpicture.Gettingintoaphysicalconfrontation冲突couldcostyouyourhealthyourjoboryoureducation.Rememberwhatreallymattersandtrytoputthesesmallannoyancesinperspective. 2.4 Ifyoucanfeelaconflictcomingbringingupsomethingdifferentcanbeagoodwaytodistractsomeone.Oftenannoyingpeoplewillbeaggressivedespitebeingobviouslywrongbecausetheyseetheconfrontationasabattleofegos自我.5 Ifforexamplesomeoneisinvadingyourspacetrydirectinghimtosomethinginyoursurroundingsthatisfunnyorinteresting.Ifsomeoneispestering纠缠youwithanannoyingtopicofconversationtrytobringupsomethingelsethatyouknowwillinterestthem. A.Beflexible. B.Changethesubject. C.Don'tpretendtoignoreit. D.Don'trollyoureyesormakemeanfaces. E.Yetweoftenhavenochoicebuttodealwiththem. F.Takeafewdeepbreathsandfocusonyourbreathingtocalmyourself. G.Onceyou'vestoppedtheirangertheymightnolongerfeeltheneedtoannoyyou.
XYZM为短周期元素原子序数依次增大YM同主族X的简单氢化物遇M单质产生白烟Z的氧化物与M的氢化物不反应可与Y的氢化物反应．下列说法正确的是
Nowadaysthefortravellingisshiftedfromshoppingtofoodandscenery. A.priority B.potential C.proportion D.pension
Twothingschangedmylife:mymotherandawhiteplasticbikebasket.Ihavethoughtlongandhardaboutitandit'strue.Iwouldbeadifferentpersonifmymomhadn'tturnedasillybicycleaccessoryintoalifelessonIcarrywithmetoday. Mymotherandfatherwereunitedintheirwayofraisingchildrenbutitmostlyfelltomymothertoactuallycarryitout.LookingbackIhonestlydon'tknowhowshedidit.Managingthefamilybudgetmusthavebeenaveryhardtask.butshemadeitlookeffortless.Ifwecomplainedaboutnothavingwhatanotherkiddidwe'dhearsomethinglikeIdon'tcarewhatso﹣and﹣sogotforhisbirthdayyouarenotgettingaTVinyourroomacarforyourbirthdayalsvishsweet16party.Wehadtoearnourallowance零用钱bydoingchoresaroundthehouse.Icanstillrememberhowlongittooktopolishthelegsofourcoffeetable.Mybrotherscannodoubtrememberhoursspentcleaningthehouse.LikethetwolittlegirlsgrowingupattheWhiteHousewemadeourownbedsnooneleftthehouseunitilthatwasdoneandpickedupafterourselves.Wehadtokeeptrackofourbelongingsandifsomethingwaslostitwasnotreplaced. Itwassummerandonedaymymotherdrovemetothebikeshoptogetatirefixed﹣﹣﹣andthereitwasinthewindowWhiteshinyplasticanddecoratedwithflowersthebasketwinkedatmeandIknew﹣﹣﹣﹣Iknew﹣﹣﹣Ihadtohaveit. It'sbeautifulmymothersaidwhenIpointeditouttoherWhataneatbasket. ItriedtoholdoffatfirstIplayeditcoolforashortwhile.ButthenIguessIcouldn'tatanditanylonger:MonpleasecanIpleasepleasegetit?I‘lldoextrachoresforaslongasyousayI'lldoanythingbutIneedthatbasketIlovethatbasket.PleaseMom.Please? Iwasdesperate. YouknowshesaidgentlyrubbingmybackwhilewebothstaredatwhatIbelieveswasthecoolestthingeverIfyousaveupyoucouldbuythisyourself. BythetimeImakeenoughit'llbugone! MaybeRogerherecouldholditforyoushesmiledatRogerthebikeguy. Hecan'tholditforthatlongMom.Someoneelsewillbuyit.PleaseMomPlease? Theremightbeanotherwayshesaid. Andsoourpayingplanunfolded.MymotherboughtthebeautifulbasketandputitsafelyinsomehidingplaceIcould'tfind.EachweekIeagerlycountedmygrowingsavingincreasedbyextraworkhereandtherewashingthecarhelpingmymothermakedinnerdeliveringorcollevtingthingsonmybikethatalreadylookednakedwithoutthebasketinfront.AndthenweekslaterIcountedre﹣countedandjumpedforjoy.Ohhappyday!Imadeit!Ifinallyhadtheexactamountwe'dagreedupon…. Dayslatertheunthinkablehappened.AneighborhoodgirlI'dplayedwithmillionsoftimesappearedwiththeexactsamebasketfixtedtohershinynewbikethatalreadyhadallthebellsandwhistles.Irodehardandfasthometotellmymotheraboutthisdisaster.Thishorribleturnofevents. Andthencamethelesson.I'vetakenwithmethroughmylife:HoneyYourbasketisextra﹣specialMomsaidgentlywipingawaymyhottears.Yourbasketisspecialbecauseyoupaidforityourself. 55.Whatcanwelearnfromthefirsttwoparagraphs? A.Thechildrenenjoyeddoinghousework. B.Theauthorcamefromswell﹣offfamily C.Themotherraisedherchildreninanunusualway D.ThechildrenwerefondoftheUSpresident'sdaughters. 56.Whentheauthorsawthebasketinthewindowshe. A.fellinlovewithit B.staredathermother C.recognizeditatonce D.wentuptothebikeguy 57.Whydidtheauthorsaymanypleasetohermother? A.Shelongedtodoextrawork. B.Shewaseagertohavethebasket. C.Shefelttiredafterstandingtoolong. D.Shewantedtobepolitetohermother. 58.ByusingnakedParagraph12theauthorseemstostressthatthebasketwas A.somethingshecouldafford B.somethingimportanttoher C.somethingimpossibletoget D.somethingshecoulddowithout 59.Totheauthoritseemedtobeahorribleturnofeventsthat A.somethingspoiledherpayingplan B.thebasketcostmorethanshehadsaved C.aneighborhoodgirlhadboughtanewbike D.someoneelsehadgotabasketofthesamekind 60.Whatisthelifelessontheauthorlearnedfromhermother? A.Savemoneyforarainyday B.Goodadviceisbeyondallprice. C.Earnyourbreadwithyoursweat D.Godhelpsthosewhohelpthemselves.
短周期主族元素XYZW原子半径依次增大W是短周期主族元意中原子半径最大的元素Z原子的核外电子数是X的两倍Z与X同主族Y与Z同周期．下列说法正确的是
Inthe1960swhilestudyingthevolcanichistoryofYellowstoneNationalParkBobChristiansenbecamepuzzledaboutsomethingthatoddlyhadnottroubledanyonebefore:hecouldn'tfindthepark'svolcano.IthadbeenknownforalongtimethatYellowstonewasvolcanicinnature﹣that'swhataccountedforallitshotspringsandothersteamyfeatures.ButChristiansencouldn'tfindtheYellowstonevolcanoanywhere. Mostofuswhenwetalkaboutvolcanoesthinkoftheclassiccone圆锥体shapesofaFujiorKilimanjarowhicharecreatedwheneruptingmagma岩浆pilesup.Thesecanformremarkablyquickly.In1943aMexicanfarmerwassurprisedtoseesmokerisingfromasmallpartofhisland.Inoneweekhewastheconfusedownerofaconefivehundredfeethigh.Withintwoyearsithadtoppedoutatalmostfourteenhundredfeetandwasmorethanhalfamileacross.AltogethertherearesometenthousandofthesevolcanoesonEarthallbutafewhundredofthemextinct.Thereishoweverasecondlessknowntypeofvolcanothatdoesn'tinvolvemountainbuilding.Thesearevolcanoessoexplosivethattheyburstopeninasinglebigcrackleavingbehindavastholethecaldera.YellowstoneobviouslywasofthissecondtypebutChristiansencouldn'tfindthecalderaanywhere. JustatthistimeNASAdecidedtotestsomenewhigh﹣altitudecamerasbytakingphotographsofYellowstone.Athoughtfulofficialpassedonsomeofthecopiestotheparkauthoritiesontheassumptionthattheymightmakeaniceblow﹣upforoneofthevisitors'centers.AssoonasChristiansensawthephotosherealizedwhyhehadfailedtospotthecaldera:almostthewholepark﹣22millionacres﹣wascaldera.Theexplosionhadleftaholemorethanfortymilesacross﹣muchtoohugetobeseenfromanywhereatgroundlevel.AtsometimeinthepastYellowstonemusthaveblownupwithaviolencefarbeyondthescaleofanythingknowntohumans. 1WhatpuzzledChristiansenwhenhewasstudyingYellowstone? A.Itscomplicatedgeographicalfeatures. B.Itsever﹣lastinginfluenceontourism. C.Themysterioushistoryofthepark. D.Theexactlocationofthevolcano. 2Whatdoesthesecondparagraphmainlytalkabout? A.Theshapesofvolcanoes. B.Theimpactsofvolcanoes. C.Theactivitiesofvolcanoes. D.Theheightsofvolcanoes. 3Whatdoestheunderlinedwordblow﹣upinthelastparagraphmostprobablymean? A.Hot﹣airballoon. B.Digitalcamera. C.Bigphotograph. D.Bird'sview.
Unliketraditionalgymsapp﹣backedgymsofferpeopleoptionstoexercise. A.casual B.regular C.flexible D.tight
theconvenienceofdigitalpaymentmanyseniorcitizensstartedtousesmartphones. A.Toenjoy B.Enjoying C.Tohaveenjoyed D.Enjoy
Theseating1arrangeisprobablythemostimportantpartofChinesediningetiquette礼仪.Moderndiningetiquetteisenacted进行发生accordingto2principles:themasterofthefeastandguests. Theseatofhonor2reserveforthemasterortheguestwiththehigheststatusistheonefacingeastortheentrance.Thoseofhigherpositionsitclosertothemaster.Theguestsofthelowestpositionsit3farfromtheseatofhonor. Ifroundtables4usetheseatfacingtheentranceisthehonorone.Theseatsonthelefthandsideoftheseatofhonoraresecondfourthsixthetc.inimportance5thoseontherightarethird6fiveseventhandsoonuntilthey7jointogether. Inancienttimestherewasakindoffurnitureknownas8EightImmortalstableabigsquaretablewithbenchesfortwopeopleonboth9side.Iftherewasaseatfacingtheentrancetherighthandseatwasfortheguestofhonor.Ifthemealwasoutsideorthereweretwoormoredoors10equalimportancethentherighthandseatwhenfacingeastwasthehonorseat.
Themusicianalongwithhisbandmemberstenperformancesinthelastthreemonths. A.gives B.hasgiven C.havegiven D.give
DuringthewarmyhusbandwasstationedatanarmycampinadesertinCalifornia.Iwenttolivethereinordertobe1him.Ihatedtheplace.Ihadnever2beensounhappy.Myhusbandwasorderedoutonalong﹣termdutyandIwasleftinatinyshack棚屋alone.Theheatwas3﹣almost1250Fevenintheshadeofacactus仙人掌.4asoultotalkto.Thewindblewnon﹣stopandallthefoodIateandtheevryairIbreathedwere5withsandsandsand! IwassosorryformyselfthatIwrotetomyparents.ItoldthemIwas6andcomingbackhome.IsaidIcouldn'tstanditoneminutelonger.I7beinprison!Myfatheransweredmy8withjusttwolines﹣twolinesthatwillalwayssinginmy9﹣twolinesthatcompletelychangedmylife: TwomenlookedoutfromprisonbarsOnesawthemudtheothersawthestars. Ireadthosetwolines10Iwasashamedofmyself.ImadeupmymindIwouldfindoutwhatwasgoodinmypresent11;Iwouldlookforthestars Imadefriendswiththenativesandtheir12amazedme.Theygavemepresentsoftheirfavoriteartworkswhichtheyhad13toselltotoueists.Istudiedthedelightfulformsofthecactus.Iwatchedforthedesertsunsetsand14forseashellsthathadbeenlefttheremillionsofyearsagowhenthedeserthadbeenanocean15 Whatbroughtaboutthis16changeinme?Thedeserthadn'tchanged17Ihad.Ihadchangedmy18AndbydoingsoIchangedanunhappyexperienceintothemostamazing19ofmylife.IwasexcitedbythisnewworldthatIhaddicoveredIhadlookedoutofmyself﹣creatdedprisonand20thestars 1A.off B.behind C.near D.beyond 2A.before B.already C.then D.still 3A.inflexible B.incomprehensible C.uncontrollable D.unbearable 4A.Only B.Not C.Many D.Such 5A.covered B.filled C.buried D.charged 6A.catchingup B.keepingup C.givingup D.gettingup 7A.oughtto B.mightwell C.wouldrather D.hadbetter 8A.request B.call C.question D.letter 9A.comparison B.imagination C.consideration D.memory 10A.overandover B.byandby C.upanddown D.noeandthen 11A.company B.occupation C.situation D.relationship 12A.movement B.reaction C.guidance D.purpose 13A.refused B.failed C.managed D.happened 14A.asked B.hunted C.waited D.headed 15A.floor B.surface C.rock D.level 16A.shocking B.challenging C.puzzling D.astonishing 17A.as B.but C.for D.or 18A.attitude B.principle C.identity D.standard 19A.vacation B.operation C.affair D.adventure 20A.sought B.counted C.found D.reached
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