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已知向量=(﹣6,1),=(7,﹣2),且(+m)∥(3﹣),则m=( )
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高二下学期数学《》真题及答案
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已知平面向量a=12b=-2m且a∥b且2a+3b=
(-2,-4)
(-3,-6)
(-4,-8)
(-5,-10)
已知反比例函数y=的图象经过点32那么下列四个点中也在这个函数图象上的是
(3,﹣2)
(﹣2,﹣3)
(1,﹣6)
(﹣6,1)
已知向量且则m=
)-8 (
)-6 (
)6 (
)8
已知向量a=m4b=3-2且a∥b则m=
已知函数fx=2cos2x+2sinxcosxx∈R.1当x∈时求函数fx的单调递增区间2设△ABC
已知平面向量a=2m+13b=2m且a与b反向则|b|等于
2
或2
已知函数则不等式的解集为
(-3,2)
(-2,3)
(-1,6)
(-6,1)
已知平面向量=1﹣2=4m且则向量是
(﹣7,﹣34)
(﹣7.﹣16)
(﹣7,﹣4)
(﹣7,14)
已知向量a=12b=m4且a∥2a+b则实数m的值为.
已知直线l1的方向向量是a=24x直线l2的方向向量是b=2y2若|a|=6且a·b=0则x+y的值
-3或1
3或-1
-3
1
已知直线l的方向向量为2m1平面α的法向量为且l∥α则m=________.
平面向量中已知且则向量______
已知平面向量a=12b=-2m且a∥b则2a+3b=
(-5,-10 )
(-4,-8 )
. (-3,-6)
(-2,-4)
已知反比例函数y=的图象经过点23那么下列四个点中也在这个函数图象上的是
(-6,1)
(1,6)
(2,-3)
(3,-2)
已知A.B.C.是△ABC的三内角向量m=-1n=cosA.sinA.且m·n=1.1求角A.2若t
已知向量且则m=
-8
-6
6
8
已知向量=下列向量中与平行的向量是
(3,-6,1)
已知向量a=1mb=3-2且则m=
-8
-6
6
8
已知向量a=m-1b=.1若a∥b求实数m的值2若a⊥b求实数m的值3若a⊥b且存在非零实数kt使得
已知平面向量a=12b=-2m且a∥b则2a+3b=.
(-2,-4)
(-3,-6)
(-4,-8)
(-5,-10)
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Mr.PeterJohnsonagedtwenty﹣threebattledforhalfanhourtoescapefromhistrappedcaryesterdaywhenitlandedupsidedowninthreefeetofwater.Mr.Johnsontooktheonlyescaperoute﹣﹣throughtheboot行李箱. Mr.Johnson'scarhadfinishedupinaditch沟渠atRomneyMarsinKentafterskiddingoniceandhittingabank.FortunatelythewaterbegantocomeinonlyslowlyMr.JohnsonsaidIcouldn'tforcethedoorsbecausetheywerejammedagainstthewallsoftheditchanddarednotopenthewindowsbecauseIknewwaterwouldcomefloodingin. Mr.JohnsonasweetsalesmanofSittingHomeKentfirsttriedtoattracttheattentionofothermotoristsbysoundingthehornandhammeringontheroofandboot.Thenhebeganhisstruggletoescape. LaterhesaidItwasreallyahalfpennythatsavedmylife.ItwastheonlycoinIhadinmypocketandIusedittounscrewthebackseattogetintotheboot.Ihammereddesperatelywithahammertryingtomakesomeonehearbutnohelpcame. Ittooktenminutestounscrewtheseatandafurtherfiveminutestoclearthesweetsamplesfromtheboot.ThenMr.Johnsonfoundawrenchandbegantoworkonthebootlock.Fifteenminutespassedby.ItwastheonlychanceIhad.FinallyitgavebutassoonasImovedthebootlidthewaterandmudpouredin.Iforcedtheliddownintothemudandscrambledclearasthecarfilledup. HishandsandarmscutandbruisedMr.JohnsongottoBeckettFarmnearbywherehewaslookedafterbythefarmer'swifeMrs.LucyBates.TremblinginablankethesaidThatthirtyminutesseemedlikehours.Onlythetipsofthecarwheelswerevisiblepolicesaidlastnight.Thevehiclehadsunkintotwofeetofmudatthebottomoftheditch. 1Inwhichsectionofanewspapercanwereadthisarticle? A.Bookreview B.Newsreport C.Campuslife D.Continuedstory 2TheunderlinedsentenceinParagraph5Finallyitgavemeansthat. A.luckilythedoorwastornawayintheend B.atlastthewrenchwentbroken C.thelockcameopenafterallhisefforts D.thechancewaslostatthelastminute 3Itcanbeinferredfromthepassagethat. A.theditchwasalongaquietcountryroad B.theaccidenthappenedonaclearwarmday C.thepolicehelpedMr.Johnsongetoutoftheditch D.Mr.Johnsonhadatenderwifeandwaswellattended
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OurMuseumsGalleriesandZoo 19world﹣classmuseumsgalleriesandazoo TheSmithsonianofferselevenmuseumsandgalleriesontheNationalMallandsixothermuseumsandtheNationalZoointhegreaterNationalCapitalArea.InNewYorkCityweinviteyoutotourtwomuseumsinhistoricsettings. NotnearaSmithsonianmuseum?Lookforexhibitionsandmuseumsinyourcommunity.Herewehavelistedsomeplacestovisit Tips&Guidelines StopatanySmithsonianmuseuminformationdeskwherefriendlyandknowledgeablestaffandvolunteerscanassistyouinplanningyourvisit. ServiceanimalsarewelcomeatthemuseumsandtheNationalZoo.Petsarenotpermitted. Lunchesshouldbeproperlyclosedorstoredinlockersduringyourvisit. 1TheSmithsonianoffersalltheseEXCEPT. A.galleries B.concerts C.museums D.zoos 2Ifyouareinterestedinanimalsyoucan. A.goto1661PennsylvaniaAvenueNWWashingtonDC B.goto8thandFStreetsNWWashingtonDC C.visitthemuseum11a.m.onChristmas D.visitthezooatweekendsonJune25 3Toarrangeyourvisitbetteryoucan. A.havelunchduringyourvisit B.takeyourpetsalongwithyou C.askthestaffandvolunteersforhelp D.fillinanapplicationformbeforeyourvisit
TheMonkeesbupabout1970buthappilytheyreunitedinthemid﹣1980﹩.
WhilecheckingoutatthegrocerystoreInoticedawomanbehindme.Shewas1oneofshoppingcartswiththebasketinfront.Thebasket2justafewitemssomeapplesaloafofbreadsomecannedgoodsanda3ofcoral﹣coloredroses.I4toherthattheywereindeedverylovelyroses.ShesaidIreallydolovethemthey'remyfavorite5. WelljustasIwasleavingIheardhersaytothecashierYoucan6thebunchofrosesbackIreallycouldn't7them.Iturnedaroundandaskedherifshewould8metogetthemforher.She9herheadandsaidWhywouldyouwanttodothat?Youcertainlydon'thaveto.IrepliedthatIjustwantedto10sinceshelovedthemsomuch.Shestillseemed11.SoItoldher12shewouldallowmeto13themtohershewouldbedoingmeafavor.WithtearsinhereyesshesaidIreallydolovethem.Thanks.AsI14thecashierthemoneyfortherosesInoticedhewasalittle15aswell. OnthewayhomeIwasreminded16asongIhadhearddecadesagoandI'velovediteversince.Thesongis'BreadandRoses'.It'sabeautifulsongonmanylevelsandremindsusthatwe17needfoodbutweallalsoneed18. Alinefromthissongfitsthissituationperfectly.It19Heartsstarveaswellasbodies.Giveusbreadbutgiveus20too. 1A.driving B.holding C.dragging D.pushing 2A.held B.Put C.presented D.produced 3A.box B.bunch C.basket D.handful 4A.Showed B.commented C.introduced D.recommended 5A.smell B.shape C.color D.memory 6A.deal B.put C.pick D.come 7A.make B.collect C.manage D.afford 8A.allow B.advise C.want D.prefer 9A.nodded B.shook C.lowered D.raised 10A.partly B.especially C.specially D.merely 11A.puzzled B.shocked C.hesitant D.Regretful 12A.if B.but C.only D.just 13A.owe B.pass C.gift D.deliver 14A.charged B.awarded C.offered D.handed 15A.teary﹣eyed B.starry﹣eyed C.weary﹣eyed D.sharp﹣eyed 16A.of B.for C.to D.if 17A.notif B.notbut C.noteven D.notonly 18A.love B.share C.money D.beauty 19A.reads B.sings C.speaks D.shows 20A.goodness B.roses C.comfort D.medicine
LearningFastandDeep Overthepastfiveyearsresearchersinartificialintelligencehavebecometherockstarsofthetechnologyworld.AbranchofAIknownasdeeplearningwhichusesneural神经的networkstoscanthroughlargevolumesofdatalookingforpatternshasprovensousefulthatskilledpractitionerscancommandhighsix﹣figuresalariestobuildsoftwareforAmazonAppleFacebookandGoogle. ThestandardrouteintothesejobshasbeenaPhDincomputersciencefromoneofAmerica'stopuniversities.Earningonetakesyearsandrequiresapersonalitysuitedtoacademiawhichisrareamongmorenormalfolk. Thatischanging. Lastmonthfast.aianon﹣profiteducationorganizationbasedinSanFranciscokickedoffthethirdyearofitscourseindeeplearning.Sinceitsfoundationithasattractedmorethan100000studentsaroundtheglobefromIndiatoNigeria.ThecourseandotherslikeitcomewithasimpleideathereisnoneedtospendyearsobtainingaPhDinordertopractisedeeplearning.Creatingsoftwarethatlearnscanbetaughtasacraftnotasahighintellectualpursuittobeundertakenonlyinanivorytower.Fast.ai'scoursecanbecompletedinjustsevenweeks. TomakeitaccessibletoanyonewhowantstolearnhowtobuildAIsoftwareistheaimofJeremyHowardwhofoundedfast.aiwithRachelThomasamathematician.Hesaysschoolmathematicsissufficient.No.Greek.LettersMr.Howardintonespoundingthetablewithhisfistforpunctuation. SomeexpertsworrythatthiswillserveonlytocreateafloodofunreliableAIsystemswhichwillbeuselessatbestanddangerousatworst.IntheearliestdaysoftheInternetonlyaselectfewnerdsnamelycomputerholicswithspecificskillscouldbuildapplications.Notmanypeopleusedthem.ThentheinventionoftheWorldWideWebledtoanexplosionofwebpagesbothgoodandbad.ButitwasonlybyopeninguptoallthattheInternetgavebirthtoonlineshoppinginstantglobalcommunicationsandsearch.IfMr.HowardandothershavetheirwaymakingthedevelopmentofAIsoftwareeasierwillbringforthanewcropoffruitofadifferentkind. 1Whatcanwelearnaboutdeeplearning? A.Itreplacesartificialintelligence. B.Itattractsrockstarstopractice. C.Itscanspatternsforlargecompanies. D.Ithelpstechnicianstocreatesoftware. 2Fast.aiisanorganizationthat. A.ensuresonetoobtainaPhD B.teachescraftinivorytower C.offersacourseindeeplearning D.requiresweekstoapply 3TheunderlinedwordsNo.Greek.LettersinParagraph5meansdoingfast.aicourseis. A.easy B.difficult C.interesting D.boring 4Itcanbeinferredfromthelastparagraphthat. A.itisquitereliableforanyonetograspartificialintelligence B.theInternethasbroughtforthafloodofuselessAIsystems C.openinguptoallleadstoinstantglobalsearchandonlineshopping D.simplifyingsoftwaredevelopmentmayresultinunexpectedoutcomes
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AphotographthatonehastakenofoneselftypicallywithasmartphoneorwebcamanduploadedtoasocialmediawebsiteisthedefinitionofselfieintheOxfordEnglishDictionary.Infactitwasn'teveninthedictionaryuntilAugustoflastyear.Itearneditsplacetherebecausepeoplearenowsoobsessedwith对……痴迷selfies﹣wetakethemwhenwetryonanewhatplaywithourpetsorwhenwemeetafriendwhomwehaven'tseeninawhile. Butisthereanyscientificexplanationforthisobsession?WellyoushouldprobablyaskJamesKilneraneuroscientist神经系统科学家atUniversityCollegeLondon. Throughourlifetimewebecomeexpertsatrecognizingandinterpretingotherpeople'sfacesandfacialexpressions.IncontrastaccordingtoKilnerwehaveaverypoorunderstandingofourownfacessincewehavelittleexperienceoflookingatthem﹣wejustfeelthemmostofthetime. ThishasbeenprovedinpreviousstudiesaccordingtotheBB24C. Kilnerfoundthatmostpeoplechosethemoreattractivepicture.Thissuggeststhatwetendtothinkofourselvesasbetter﹣lookingthanweactuallyare.TofurthertesthowweactuallyperceiveourownfacesKilnercarriedoutanotherstudy.Heshowedpeopledifferentversionsoftheirownportrait﹣theoriginalonethathadbeeneditedtolooklessattractiveandonethatwasmademoreattractive﹣andaskedthemtopicktheversionwhichtheythoughtlookedmostlikethem.Theychosethemoreattractiveversion. Butwhatdoesitsayaboutsettles?Wellisn'tthatobvious?Selfiesgiveusthepowertocreateaphotograph﹣bytakingitfromvariousangleswithdifferentposesusingfilters滤色镜andsoon﹣thatbettermatchesourexpectationswithouractualfaces. Yousuddenlyhavecontrolinawaythatyoudon'thaveinnon﹣virtual非虚拟的interactionsKilnertoldtheCanada﹣basedCTVNews.Selfiesallowyoutokeeptakingpicturesuntilyoumanagetotakeoneyou'rehappywithheexplained. 1Whatisthepassagemainlyabout? A.Thedefinitionandfunoftakingselfies. B.Theexplanationofwhypeoplelovetakingselfies. C.Howtakingselfiesinfluencespeople'sdailylives. D.Howtointerpretpeople'sfacialexpressionsintheirselfies. 2TheunderlinedwordperceiveinParagraph5canbereplacedby. A.interpret B.beautify C.choose D.destroy 3AccordingtoKilnerpeopleliketakingselfiesprobablybecausetheythink. A.itisagoodchancetolearnmoreabouttheiractualfaces B.itisawaytorespondtoothers'facialexpressionscorrectly C.itenablesthemtointeractwiththeirfriendsinsocialmedia D.itallowsthemtosatisfytheirexpectationswiththeirappearances
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TheSurprisinglyEasyTrickThatCanHelpYouUseYourPhoneaLittleBitLess ThefirstthingIdointhemorningsislookatmyphone.That'smainlybecausemyphoneismyalarmclockbutoncemyeyesareopenandthatscreenislitupinmyhandsit'sanawfullyshorttriptocheckingemailsandperusingheadlines.1Myemailsthatearlyinthemorningaremainlyjunkandtheheadlineswon'tchangemuchbeforeI'vebrushedmyteethandpouredacupofcoffeeright? MywifesaysI'maddictedtomyphone.2I'mnotterriblyactiveonsocialmediabutIdoenjoymesomeidlescrollingenjoyplayingthemobilephone.Andwowdothesetechcompaniesknowhowtokeepthosethumbsconstantlyswipingup. 3WhileIthinkwe'reprettygoodaboutlimitingherscreentimeitwouldseemthattechnologyhashaditshooksinmefromthestart.SoIdecidedtotrylooseningmyphone'sgrasponmyattentionbyswitchingthescreentoblackandwhite. Changingthedisplaytoblackandwhiteisveryeasy.InyouriPhone'ssettingschooseGeneralthenAccessibility.NextchooseDisplayAccommodationsthenColorFilters.Tapthetoggleonandalistoffiltersappears.4 ButnoonewantstogothroughallthiseverytimetheywanttoturncolorbackontocheckoutanInstagramstory.Clearlyyoudon'talwayswantyourscreentobeblackandwhite.Afteralltherewillunavoidablybephotostoviewandvideostoshare.5IntheAccessibilitymenutapAccessibilityShortcutandchooseColorFilters.Nowpressingthehomebuttonthreetimeswillswitchyourdisplaytocolorandthenbackwithanotherthree. A.There'snoreasonformetobedoingthis. B.We'vegotathree﹣year﹣oldchild. C.ChooseGrayscaleandyou'reallset. D.Itcanhelpyouuseyourphonealittlebitless E.IdisagreebutIcandefinitelystandtospendlesstimelookingatit. F.Herecomesasurprisinglyeasytrick. G.Thatiswhatmakessettingashortcutnecessary.
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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. Manychildrentakewhattheirparentsdoforthemforgranted.Theyhaven'trealizedthemeaningofbeinggrateful.Buttheyalwaysgetangrywiththeirparentbecausetheydon'tgetwhattheywant.Myfriendoncetoldmenewsthatalittlegirlwentoutofthehouseandrefusetoreturnhomeasherparentsdidnotgiveherenoughpocketmoney.Iwassoshockingtohearit.IwouldneveraskmuchfrommyparentsbecauseIknewitwasnoteasyforhimtomakealiving.AndIalwaysfeelsothankfulforthattheyhaveofferedtome.IfsomeonewhogivesmeahandwhenIaminneedIwillrememberhimandifIrealhaveachanceIwillpayhimback.Inshortitisagratefulheartthatmakesusbecomekindpeopleandcreateaharmoniousenvironment.
Hefoundhimself包围bykindness.
Ifyouaskmostpeoplewhatwatertasteslikethey'llprobablytellyouthatwaterhasnotasteandtheymaygiveyouafunnylook.Butifyouwereafruitflyaskinganotherfruitflythatquestionmighthaveadifferentanswer. Toafruitflywaterhasataste.Scientistswanttoknowhowthefruitflyknowswaterbecausethisinformationmayhelpinlearninghowotheranimalsmanagetousewaterintherightway.Waterisveryimportanttolifebuttoomuchortoolittlecanbedeadlytoalivingcreature.Sobyunderstandinghowthefruitflytasteswaterresearchersmaylearnmoreaboutotherlivingthings. AccordingtothenewstudyaproteincalledPPK28makesitpossibleforaflytotastewater.Proteinsbuildcellsandtissuesfightdiseaseandcarrymessagesbetweencells.It'snotsurprisingthataproteinisresponsibleforthefruitfly'sabilitytotastewater. ThePPK28proteinispartofalargerfamilyofsimilarproteins.Oneoftheserelatedproteinsisusedbymammalsincludinghumanstotastesalt.Scientistshavenotfoundaproteinthatenableshumanstotastewater.IntheexperimentCameronandhisteamcomparednormalfruitflieswithfruitflieswhosetastecellshadhadbeendisabled.ThefruitfliesweregivenaspecialchemicalthatwouldglowwhentheflyusedthePPK28protein.Thenthescientistsledthefliestowater.WhenthenormalfliestastedthewaterthePPK28proteinlitup﹣showingthatitwasinuse.Thefruitflyinparticularissointerestingthatsomescientistsarehardatworkcreatingacompletemapofthefruitflybrain.Thismapwillshowallofafly'sneuronsandhelpscientistsunderstandhowtheneuronsworktogether. 1Howdomostpeoplefeelwhenaskedthetasteofwater? A.Disappointed B.Frightened. C.Amused D.Disgusted. 2Whydoscientistswanttounderstandhowthefruitflyknowswater? A.Todecreasethenumberofthefruitfly. B.Toknowmoreaboutothercreatures. C.Tomanagetousewatercorrectly. D.Todescribethetasteofwater. 3WhatdoweknowaboutthePPk28protein? A.Itcanmakehumanstastesalt. B.Itenablesthefruitflytotastewater. C.Thefruitflycan'tlivewithoutit. D.Thefruitflyusesittoavoidillnesses. 4Whatwillthescientistscontinuetoworkat? A.MakingthePPk28protein. B.Tellingmoreinformationaboutcells. C.Creatingmapsofhumanbrains. D.Studyingthefruitfly'sneuronsystems.
假设你是红星中学高三学生李华请根据以下四幅图的先后顺序写一篇英文周记记录上周你和同学参与国家博物馆庆祝改革开放四十周年大型展览Celebrating40thAnniversaryofReformandOpening﹣up志愿者活动的全过程. 注意词数不少于60提示词国家博物馆theNationalMuseumofChina
Whetheryoulikeitornotasstudentsyouhavetolivewithroommatesaftergoingtoschooloruniversity.Havingaroommatecanbeoneofthebestexperiencesoreasilyoneoftheworst.1 Herearefivetipsforyoutofollowtoavoidthecommonmistakesthatmakegoodroommaterelationshipsworse. Talkthingsout.2Ifsomethinghappenssitdownwithyourroommatesandhaveaface﹣to﹣faceconversation.Complainingaboutyourroommatesbehindtheirbackscreatesnothingbutbadsituationsandgeneralunhappiness. 3Someroommatesbecomethebestoffriendsandsomedon't.Don'tputpressureonyourselforyourroommatetoreachthislevelespeciallywhenyoufirstmeet.Rememberyouaretryingtomakeanewfriendnotfrightenyourroommateaway.Andifyouroommatedoesn'tendupbeingyourbestfriendthereisnoneedtoworryaboutit. Cleanupafteryourself.Oratleastkeepyourthingsonyourside.4Butbeingconsiderate考虑周到的withwhereyouputyourownstuff东西willhelpyouavoidthearguments. Askbeforeyoutake.Thisappliesto适用于foodclothesandanythingelsethatyoudon'town.5Evenifyoubothagreetoshareeverythingyoushouldstillask. A.Don'texpecttobebestfriends. B.Communicationisofvital至关重要的importance. C.Youdon'tneedtokeeptheroomcleanandorganizedallthetime. D.Roomscanbereallyeasyforamesstopileup. E.Ifyouwanttohaveagoodrelationshipwithyourroommateitallstartswithyou. F.Trytomakeyourroommatesyourbestfriends. G.Showyourroommatethatyouhaverespectforhisorherthings.
假设你是南阳中学的学生李华将参加主题为Let'spickupabookandread的英语演讲比赛.请你写一份演讲稿主要内容包括 1.目前很多学生课余时间沉溺于网络远离书本导致记忆力减退对学习失去兴趣等问题. 2.阅读的益处如开阔视野增强理解力提高成绩等. 注意1.词数100左右.演讲稿开头和结尾已给出但不计入总词数. 2.可适当增加细节以使行文连贯. Goodmorningeveryone I'mLiHuafromNanyangMiddleSchool.ThetopicofmyspeechisLet'spickupabookandread. Thankyou!
IntheUSAColumbusDayisinmofthearrivalofChristopherColumbusintheNewWorld.
It'sasadandfamiliarvoicethatweoftenhearinbigcitiesCanyousparesomechange? Usuallywhenfacedwiththatparticular1IhavefeelingsofguiltifIpassby2givingacoinortwo. Ihadthatfeeling3inVenicewhileonatourofItaly'sfamoussitesin2006.Ihadtakenrefugefromthe4inaquietcafé.Outsidetherewasanoldwomankneelingonthehardancientpavingstones5. Steady6oftouristswerewalkingpasther.Ayoungbackpackerstoodawayfromthecrowd7drinkinginthescenerybutInoticedtheyoungtravelerwasalso8theoldwoman. Atouristgroupwalkedalongthestreet9thewomanandwalkedon.10groupoftouristsarrivedandwalkedpasttheoldlady.Thebackpackerwatched11everybodyelsewentontheirwayfocusedonthe12aroundthem.ThenIwaspreparingtoleavewhenIcaughtsightofthebackpackersteppingforwardand13somemoneyinthewoman'scup.Hedidthissomewhat14justbeforethearrivalofanothertouristgroup.AsI15theleaderofthegroupstoppedandputsomemoneyinthecup.Havingbeenshownthewayothertouristsfollowedsuitand16somemorecoinstothecup. Hisworkdonetheyoungmanwalkedovertotheoldbeggar﹣womanpattedherontheshoulderandsaidIhopethat17alittle. Idon'tknowifthewomanunderstoodhisEnglishor18whathadjusthappenedbutIdid. Iplacedsomemoneyinthewoman'scupandcontinuedmytravels19afterwitnessingsuchan20actofkindness. 1A.sound B.question C.excuse D.command 2A.beyond B.after C.without D.before 3A.manytimes B.sometimes C.onlyonce D.onceagain 4A.crowds B.families C.streets D.signs 5A.singing B.crying C.begging D.trembling 6A.streams B.packs C.masses D.groups 7A.simply B.seemingly C.similarly D.specially 8A.showing B.following C.checking D.observing 9A.glancedat B.laughedat C.rushedat D.staredat 10A.One B.More C.Another D.Other 11A.if B.since C.because D.as 12A.stones B.sights C.signs D.tourists 13A.lending B.borrowing C.placing D.taking 14A.accidentally B.successfully C.deliberately D.cheerfully 15A.watched B.shown C.understood D.walked 16A.changed B.charged C.found D.added 17A.measures B.helps C.explains D.matters 18A.recognized B.caught C.realized D.figured 19A.pleasant B.annoyed C.disappointed D.delighted 20A.beautiful B.admirable C.pure D.accurate
Abdietandregularphysicalactivitywillhelpyoukeepfit.
ThemusicwaswrittenbyAbingafolkmwhowasborninthecityWuxiin1893.
BothEnglishandFrenchareolanguagesinCanada.
Tobehalotofpeopleattachgreatimportancetobecomingrichandfamous.
Althoughitisoftencalledthekoalabearthislovelyanimalisnotactuallyabearatall.Itisamarsupial有袋目哺乳动物andlikekangaroosafemalekoalacarriesherbabyinherpouch育儿袋foraboutsixmonths. KoalasliveinfourstatesonlyineasternAustraliawheretheeucalyptustrees桉树theylovearemostplentiful.Infacttheyrarelyleavethesetreestheirsharpclawseasilykeepingthemhighupintheair. Duringthedaytheysleepforupto18hours.Whennotasleeptheyfeedoneucalyptusleavesespeciallyatnight.Koalasdonotdrinkmuchwaterandtheygetmostoftheirwaterfromtheseleaves.Eachanimaleatsalargeamountforitssize﹣abouttwoandahalfpoundsofleavesadayevenstoringsnacksofleavesinpouches. Thekoalabearswerewidelyhuntedduringthe1920sand1930sandtheirpopulationsdecreasedsuddenly.Helpedbyreintroductiontheyhavereappearedovermuchoftheirformerrangebuttheirpopulationsaresmaller.Koalasneedalotofspace﹣aboutahundredtreesperanimal﹣whichisapressingproblemasAustralia'swoodlandscontinuetogetsmallerbecausethetreestheyliveonarebeingcutdowntomakefarms.Alsoforestfirescausedbyheatwavesaredestroyingtheforeststhekoalaslivein. Ithasbeenestimated估算thatthereareonly100000koalasleftinthewildwiththelowestestimatesbeingnomorethan43000.ThekoalacanonlyeateucalyptusleavesandlivesnowhereelseexceptAustraliasoinordertosurvivehumaneffectonitslimitedenvironmentmustbecontrolledorthisattractivecreaturefacescertainextinction. 1Whyarekoalasindangerofdyingoutaccordingtothetext? A.Manyofthemdiedintheforestfire. B.Theycan'tbeusedtotheglobalwarming. C.Theirlivingenvironmentisgraduallybeingworsened. D.Farmersareburningtheeucalyptustreesthatkoalasliveon. 2Whathappenedduringthe1920sand1930s? A.Koalasfacedgreatdanger. B.Koalagotwellprotected. C.Koalas'populationfellslowly. D.Koalahadenoughspacetolivein. 3Whatwilltheauthormostprobablytalkaboutnext? A.Howtoincreasekoalas'population. B.Howtomakethebestofthelimitedenvironment. C.Howtohelpkoalasgetusedtothenewlivingenvironment. D.Howtoreducehumaneffectonkoalas'livingenvironment.
HowtomakeQuickDecisionsForYourLife Wemakedecisionseveryday.1Whenitcomestomakingdecisionschoosingtherightonecanattimesbestressfulespeciallyifthedecisionmustbemadequickly.Indecisionoftenweighsusdownbuttherearesomeusefultipsformakingquickdecisionsmoreeasily. 2Sometimesthekeytomakingaquickdecisioncomesdowntoplanningaheadoftimeforjustsuchanoccasion.Weallknowwe'regoingtocometoanimportantdecision﹣makingpointsoonerorlatersohavingaplanalreadyinhandcanputourmindateasewhenthattimecomes. Overcomefear.3Whileitmayseemdifficulttoovercomethefearofmakingthewrongchoicemanyexpertsagreethatweshouldn'tbeafraidtomakethewrongdecisionevenifitseemsimportant.Thevastmajorityofwrongdecisionscanbecorrectedwhiledelayingdecisionscanoftenleadtomoreproblems. Writedownalltheadvantagesanddisadvantagesofyourdecision.Evenifyoudon'thavealltheinformationwritingdownalltheprosandcons优缺点isagoodstartingpointforfiguringoutwhattodo.Incaseswheretheresimplyisn'tenoughtimetowritethingsdownmakeamentallistinyourmind.Thinkingoftheprosandconscanhelpyouorganizeyourthoughts.4 Determinecriteria.Rememberthateverydecisionyoumakeshouldcomewithacertainlistofcriteria.5Butonceyouknowtherequirementsyou'relookingformakingadecisionwillbecomeeasier.Lookforthechoicethatsatisfiesthelistyou'vemadeandoncethatchoiceisfoundyoushouldmoveaheadwithit. A.Haveaplan. B.Thelistmaybeshortorquitelong. C.Communicateyourdecisionwithothers. D.Andthiscanalwaysleadtoaclearanswer. E.Socutoutanyoptionsthatyouknowyouwillnotchoose. F.Oftenonethingthatkeepsusfrommakingdecisionsisfear. G.Somecanbeveryimportantwhileothersarenotseriousinthelongrun.
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