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2017年5月14日，第一届“一带一路”国际高峰论坛在北京举行，为了解不同年龄的人对“一带一路”关注程度，某机构随机抽取了年龄在15﹣75岁之间的100人进行调查，经统计“青少年”与“中老年”的人数...
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高二下学期数学《》真题及答案
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2017年5月14日一带一路国际合作高峰论坛在北京召开一带一路是合作发展的理念和倡议古丝绸之路将我国
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2019年4月第一届一带一路税收征管合作论坛在中国哪个城市举行?
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2017年5月14日．一带一路国际合作高峰论坛在北京召开．一带一路是合作发展的理念和倡议古丝绸之路
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第一届一带一路国际合作高峰论坛于2017年5月14日至15日在北京举行为了保护各国国家元首的安全某
2017年5月14日．一带一路国际合作高峰论坛在北京召开．一带一路是合作发展的理念和倡议古丝绸之路将
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现用频闪照相方法来研究物块的变速运动．在一小物块沿斜面向下运动的过程中用频闪相机拍摄的不同时刻物块的位置如图所示．拍摄时频闪频率是10Hz通过斜面上固定的刻度尺读取的5个连续影像间的距离依次为x1x2x3x4．已知斜面顶端的高度h和斜面的长度s．数据如下表所示．重力加速度大小g＝9.80m/s2． 单位cm 根据表中数据完成下列填空 1物块的加速度a＝m/s2保留3位有效数字． 2因为可知斜面是粗糙的．
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10分 Thewaytoliftupyourmood Everyonehasperiodsintheirliveswheneverythingseemsveryhardwhenthere'snobodytotalktoandthemood情绪isjustgettingworseandworse.1 Thefirstthingyoushouldtryissocializingandthinkingpositively.It'sveryhardbecauseusuallywhenwefeelsadwelockourselvesathomeandtrytothinkaboutallthebadthingswehave.Butifyou'lltrytoforceyourselfandcallafriendforacupofcoffeethechancesforchangingyourmoodintobetterareverygood.Justtrytoavoidbadthoughts.2 3Itcouldbesomethingyouwantedforalongtime﹣ashorttripacoataringoranythingthatcouldliftupyourmood.Itdoesn'thavetobecostlybutithastobegoodtoyourself. Notonlygivinggiftstoyourselfcanliftupyourmood.4Thinkofyourfriendsfamilyrelativesorevenlocalcharities慈善机构chooseonepersonandgivehimagift.Itdoesn'thavetobesomethingexpensiveorbig.Itmaybejustalittletoytoyourpoorneighbor'schild.Makinganotherpersonfeelhappywillmakeyoufeelgoodinyourheartandmind. Takecontrolofyourfeelings.Don'tletthemcontrolyou.5Justfollowtheadviceaboveandstartdoingsomething. A.Cryaloudifyoufeelitisnecessary. B.Herearesomethingsthatmayhelpyouliftupyourmood. C.Makingyourselffeelbetterisn'tthathard. D.Buyingthingstoothersmaybeaperfectwaytofeelhappy. E.Doyourbesttofindsomeonetotalkto. F.Insteadtrytothinkaboutthebrightsideofyourlife. G.Youshouldalsotrydoingsomethingonlyforyourselfsomethingtotallyselfish.
10分Manyuniversitieshavecarriedoutastudyabroadrequirementinorderforstudentstoreceiveadegree.Actuallyyouwillrealizethattravelingitselfisaneducation.1SittinginhistoryisBORING.HonestlyI'dratherhavetotakechemistrythanlistentoahistoryprofessorgoonandonandonaboutacivilizationorsomepeopleIdon'tcareabout. 2WhenIstudiedabroadinGermanyImadealotofconnectionstohistorythatIhadlearnedaboutpreviously.BeingtherewhereeventsactuallytookplacewascoolerthanlookingatpicturesonaPowerPointslide. 3IfyoustudyabroadandhavetotravelwithaclassmateIguaranteeyou'llbeabletoidentifysomeareasforimprovement.IcanremembermultipleinstanceswhereIidentifiedthatIneededtobecomeabettercommunicator.Havingtheexperienceoftravelingwillgiveyousomanymoreperspectivesonlife. Ifyoufeellikeyouhaven'texactlydefinedyouridentityleaveyourhomecountryforasemesterorlonger.Icanguaranteethatyou'llcomebackwithabetterhandleonwhoyouareandwhatyouhavetooffertheworld.4InthosefiveweeksllearnedmoreaboutwhoIamandwhatIrepresentthanthepreviousyearIhadspentonmyhomecampus. You'llreturnhomewithanewfoundappreciationforyourlifeandtheopportunitiesyou'vebeengiven.AfterItraveledaroundEuropeIcamehomesomuchmorethankfultogotoauniversitywithcomfortablehousing.5Icouldn'thavebeenhappiertoshareabathroomwith59other18﹣to22﹣year﹣oIdgirls.Icouldn'thavebeenhappiertogetupformy8a.m.courses. A.Butwhenyoutravelhistorycomestolife. B.Herearesomereasonswhyyoushouldconsidertravelingtoenhanceyourlearning. C.Whenyoutravelyou'llhavetolearnadifferentwayofliving. D.IhadsuchadeepenedappreciationforwhatIhadbeengiven. E.IfoundoutsomanythingsaboutmyselfwhenIwasinGermany. F.Allinalltravelingwillenhanceyourclassroomlearningexperiences. G.Thingslikecommunicationskillscan'talwaysbepolishedinaclassroom
10分Onedayateacherwasgivingaspeechtohisstudents.HeheldupaglassofwaterandaskedtheclassHowheavydoyouthinkthisglassofwateris? Thestudents'answersareintherangefrom20gto500g.Itdoesnotmatterontheweightitself.Itdependsonhowlongyouholdit.IfIholditforaminuteitisOK.IfIholditforanhourIwillhaveanacheinmyrightarm.IfIholditforadayIwillhavetoseethedoctor.ItisexactlythesameweightbutthelongerIholdittheheavieritbecomes. Ifwecarryourburdensallthetimesoonerorlaterwewillnotbeabletocarryon.Theburdenisbecomingincreasinglyheavier. Whatyouhavetodoistoputtheglassdownrestforawhilebeforeholdingitupagain. Wehavetoputdowntheburdensometimessothatwecanberefreshedandareabletocarryon.Sobeforeyoureturnhomefromworktonightputtheburdenofworkdown.Don'tcarryitbackhome.Youcanpickituptomorrow. Whateverburdensyouarehavingnowonyourshouldersletitdownforamomentifyoucan. 1Theteacherbroughtaglassofwatertotheclassbecause. A.hewasverythirsty B.hisarmswerestrong C.it'saphysicslesson D.itwasagoodexample 2TheunderlinedwordrangemeansinChinese? A.依据 B.范围 C.类别 D.重量 3Youcanconcludethatonemayfeelifheputdowntheburdensometimes. A.moreenergetic B.muchheavier C.morestressedout D.happier 4Thiswasalessonabouthowto_. A.keepfitbydrinkingwater B.workoutaphysicsproblem C.relaxoneselfinlife D.holdaschoolparty 5Choosethetruesentenceaccordingtothepassage. A.Youcouldbecomeheavierandheavierifyouheldaglassofwaterinyourhand. B.Allthestudentsintheclassknewwhattheweightoftheglassofwaterexactlywas. C.Theteacherhadagoodwayofmakinghislessonclearandeasytobeunderstood. D.Ifyouletyourburdensdownyourteacherwilllikeyou.
3分学生应该尊重老师并在公共场所举止得体的建议值得考虑.respectbehaveworthwhile同位语从句 .
1分Thebooksweresointerestingthattheyinnotime. A.sold B.weresold C.hadbeensold D.wouldsell
7.5分Itseemsthatthenewsindustryhasoneprimaryfocuskeepingpeopleuptodateonthestoriesofthemomentprovidingthebestinsightintoeveryinstancewherethereaderscan'tbetherethemselves.Decadesagothismeantwhennewsbrokejournalistsscrambledtocoveritdeliveringthekeyfactsanalysisandinsight.Theytoldtheiraudienceswhattheyneededtocareaboutandwhatthejournaliststhoughtwasimportant.AllofthisarrivedonyourdoorstepwiththedeliveryofthemorningpaperorwassqueezedintoanhouroflocalandnationalnewsonyourTV. Butwhilethegoalsofanewsorganizationremainthesameastheywereintheheyday全盛时期ofWalterCronkiterevolutionaryforcesbehindthesceneshavefundamentallytransformedtherelationshipthatreadershavewiththenews. Asthenewsmovesfrominktoscreensandthemobileplatformbecomestheforcetobetakenseriouslyjournalistsandthepublicationsthatsupportthemarefacedwithnewchallengesthatextendwellbeyondgatheringthetopstoriesoftheday.Asourdigitalworldexpandsouroptionsfornewsbasedonthefocuswritingstyleviewpointanddesignpublishersarefacedwiththebalancingactofmaintainingthereputationasatrustednewssourcewhiledevelopingnewincentives动机inordertoensuretheirreadership. Whilethenegativeshavebeenwelldocumentedthisongoingevolutionhasalsoresultedinamajorstepforwardforthefutureofjournalism.Ithasforcednewsbrandstolistentotheiraudiencesandbeginaconversationthatforsolongwasone﹣sided.Afterallthewebisopenfordiscussionshouldn'tourjournalismbeaswell? Readersshouldfeelempoweredtonotonlyjointheconversationaboutthenewsbutalsojoinintheeffortoftellingthewholestory.Notonlyareourmobilephonesasourceforustowatchandreadthetopstoriesthey'realsonews﹣gatheringdevicesthatempowercitizenjournaliststofillintheblanksandprovideacomprehensivepictureofthenewslandscape. 1Whatdoestheauthorthinkofthenewsindustryinthepast? A.Therewasnoeasyaccesstonews. B.Journalistsdidn'toftencommentonnews. C.Journalistswereimportantindeliveringnews. D.Publishersdidnotcareaboutreadersthatmuch. 2Thechallengesthatpublishersarefacednowarecausedby. A.people'sdecreasinginterestinnews B.moreoptionsavailablefornews C.alackofideasfornewincentives D.abadreputationofthenewsindustry 3Whatdoesthetextmainlytalkabout? A.Readersshouldbesensitivetonewsaroundthem. B.Readersshouldtakeadvantageofthemobileplatform. C.Readersdon'thavetorelyonjournalistsfornewsnow. D.Readersnowcangetinvolvedintheprocessofdeliveringnews.
15分ManystudentswanttofindfriendsontheInternetasawayofpracticingtheirlanguageskillsandlearning1differentcultures.WiththeInternetfindingfriendshasbeenmuch2easyandsuchrelationshipiscalledkeypals.Howeveryoushouldtakecarewhen3findfriendsontheInternet. Firstlookforreviewsofyourchosensites4learnmoreaboutotherstudents'experiences.Don′tjoinserviceuntilyou5doyourresearch.Thenyou'dbetteruseanicknameratherthanyourrealnametoprotect6youandnevergivepersonal7informtoanyoneyourhomeaddressphonenumberandbirthday8include.What'smoreyoushouldstopcontactwithothersifyoufeeluncomfortablewiththetopicsofconversation. Meanwhileit'sbesttoaskappropriatequestionstolearnsomeone'spersonalexperience9mayhelpyouunderstand10wholeculture.Mostimportantlytellyourteachersparentsoreventhepoliceifaproblemarises.
3分很显然你应该为你的不守信用向她道歉.obvious
15分Flyingcarsmaysoonbecomea1real.TherideshareserviceUberhasasked2expertfromNASAtheAmericanspaceagency3helpthecompanydevelopcarsthatcanfly. Uberplanstouseflyingvehicles4thefuturetoavoidtrafficinandaroundcities.Thecompanywantstousesmalltotallyelectricaircraft5couldtakeoffandlandlikeahelicopterontopofparkinggarages.Ubersaiditsflyingvehicleswouldbemuch6quietcostlesstooperateandproducelesspollutionthanhelicopters. OnepersoninSanFrancisco7writeonTwitterIusedtothinkflyingcarswasaridiculousidea.8IchangedmymindthismorningwhenIsatinheavytraffic.AnotherpersonaddedfromMumbaiIndiaI'mreadingaboutUber9hireaNASAengineertobuildflyingcarswhileI'mstuckintraffic.Thereishope. Theexpertpredictstherewillbeseveralearlymodelsofflyingcarsthatcan'tfly10theybutwithhumanpilotswithinonetothreeyears.
3分令我们欣慰的是很多保护区正在被建造以保护濒临灭绝的野生动植物免于被猎杀.reliefendangerprotect…from
如图所示A为地球赤道表面的物体B为环绕地球运行的卫星此卫星在距离地球表面的高度处做匀速圆周运动且向心加速度的大小为a已知地球同步卫星的轨道半径为6.6RR为地球的半径引力常量为G．则下列说法正确的是
下列核反应属于人工转变的是
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