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在直角坐标系xOy中，曲线（t为参数，t≠0），其中0≤a＜π，在以O为极点，x轴正半轴为极轴的极坐标系中，曲线C2：ρ＝4sinθ，曲线． （Ⅰ）求C2与C3交点的直角坐标； （Ⅱ）若C2与C...
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高二下学期数学《》真题及答案
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已知在直角坐标系xOy中直线l的参数方程为t为参数以坐标原点为极点x轴的正半轴为极轴建立极坐标系曲线
选修4﹣4坐标系与参数方程在直角坐标系xOy中直线l的参数方程为t为参数.在极坐标系与直角坐标系xO
在直角坐标系xOy中以原点O.为极点x轴的正半轴为极轴建立极坐标系.曲线C.1的参数方程为t为参数曲
在直角坐标系xOy中已知曲线C.1t为参数与曲线C.2θ为参数a>0有一个公共点在x轴上则a＝___
在直角坐标系xOy中以O.为极点x轴的正半轴为极轴建立极坐标系曲线C.ρ2﹣4ρcosθ+1=0直线
在直角坐标系xOy中曲线C的参数方程为t为参数在以原点O为极点x轴的非负半轴为极轴建立极坐标系．直
在直角坐标系xOy中以原点O.为极点x轴的正半轴为极轴建立极坐标系.若P.点为直线ρcosθ-ρsi
在直角坐标系xOy中直线l的参数方程为t为参数在以O.为极点x轴的非负半轴为极轴建立的极坐标系中曲线
在直角坐标系xOy中曲线C.1的参数方程为α为参数在极坐标系与直角坐标系xOy取相同的长度单位且以原
在平面直角坐标系xOy中以O.为原点以x轴正半轴建立极坐标系曲线C.的极坐标方程为ρ2﹣4ρsinθ
在平面直角坐标系xOy中直线l的参数方程为t为参数曲线C.的参数方程为θ为参数.试求直线l和曲线C.
在直角坐标系xOy中曲线M.的参数方程为α为参数若以直角坐标系中的原点O.为极点x轴的正半轴为极轴建
在平面直角坐标系xOy中曲线M的参数方程为t为参数且t＞0以坐标原点为极点x轴正半轴为极轴建立极坐标
在平面直角坐标系xOy中直线l的参数方程为t为参数曲线C.的参数方程为θ为参数.试求直线l和曲线C.
在直角坐标系xOy中以原点O.为极点x轴的正半轴为极轴建立坐标系.已知射线θ＝与曲线t为参数相交于A
在平面直角坐标系xOy中直线lt为参数与曲线C.k为参数交于A.B.两点求线段AB的长.
在直角坐标系xOy中曲线C.1t为参数t≠0其中0≤α＜π在以O.为极点x轴正半轴为极轴的极坐标系中
选修4﹣4坐标系与参数方程在直角坐标系xOy中直线l的参数方程为t为参数.在极坐标系与直角坐标系xO
在直角坐标系xOy中以原点O.为极点x轴的正半轴为极轴建立极坐标系.已知射线θ＝与曲线t为参数相交于
在直角坐标系xOy中以原点O.为极点x轴的正半轴为极轴建立极坐标系.曲线C.1的参数方程为t为参数曲
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LastweekendIwentsnowshoeingwithagroupofteachersfrommyschool.1itfeltalittlestrange﹣﹣﹣abitlikewearingflippers脚蹼2youswim!lfeltquiteclumsytostartwithanditwas3toclimboverthefallentreeswiththesnowshoes4tomyfeet.HoweverIlove5andamusedtowalkinginmountainousareas6Isoongotusedtoit.Ilovedwalkingthroughtheforestandseeingallthetreescoveredin7!Attimeswalkinguphillinthesnowwashard8whentherewererocksunderneaththesnow.Oncewereachedthe9itwasworthit!Themountainwe10wascalledLeTanetanditwasl292mhigh﹣﹣﹣that'shigherthanSnowdonthetallestmountaininWales!Theskywasabitgraybuttheviewswere11.Imanagedtogetsomegreat12﹣﹣﹣andrememberedtousemynewcamera!Aftertakinglotsofphotoswestartedgoingdown.Insomewaysgoingdownthemountainwasharderthan13.Itwasverysteep陡峭anditwaseasyto14inthesnow. Atthebottomwehadahotdrinkinacabin﹣﹣﹣itwasclearly15afterafewhoursofwalkinginthecold!Beforewewent16Iattemptedsledging雪橇whichI'dnever172before!Itwasgreatfun! TobehonestI'dreally18snowshoesasanalternativetothemorewell﹣known19sports.Besidesbeingalotcheaperthanskiingit'seasiertodoandisconsideredtobealot20! 1A.Atfirst B.Byday C.Aboveall D.Bychance 2A.unless B.when C.since D.before 3A.practical B.easy C.difficult D.enjoyable 4A.designed B.reviewed C.adjusted D.attached 5A.swimming B.skiing C.hiking D.riding 6A.and B.but C.if D.so 7A.mud B.fog C.dirt D.snow 8A.especially B.normally C.directly D.perfectly 9A.bottom B.top C.valley D.beach 10A.promoted B.climbed C.protected D.ignored 11A.excellent B.common C.similar D.universal 12A.assistance B.guides C.photos D.equipment 13A.lying B.checking C.stayingup D.goingup 14A.spread B.test C.slip D.sleep 15A.needed B.displayed C.controlled D.backwards 16A.upstairs B.home C.abroad D.changed 17A.gotten B.seen C.lost D.tried 18A.suspect B.dislike C.recommend D.quit 19A.extreme B.winter C.water D.track 20A.cheaper B.safer C.firmer D.slower
假定英语课上英语老师要求同桌之间互相修改作文请你修改你同桌的以下作文.文中共有10处语言错误每句中最多有两处.错误涉及一个单词的增加删除或修改. 删除把多余的词用斜线\划掉. 增加在缺词处加一个漏字符号∧并在该词下面写出该加的词. 修改在错的词下划一横线在该词下面写出修改后的词. 注意1.每处错误及修改均仅限一词. 2.只允许修改10处多者从11处起不计分. Mylistoffavoritebooksarelong.IreadalotandIjustkeepfindingnewfavorites.Inmyfamilyweoftentalkaboutthebookswearereadingandpassingaroundourfavorites.Itbenefitsawholefamily. Idiscoveredhowsharefavoritebookscanhelpstrengthafriendshiplongago.WhenIwasakidmyfriendLizbecameverysickerandwasgoingtomissalotofschool.Ifillabigbagwithsomeofmyfavoritebooksforherread.Sheneverforgotthat.Todayshelivesthousandofmilesawayfrommebutshesometimese﹣mailswithmeaboutthebookssheisreading.
假定你是李华最近你要为你们学校的英文报写一篇关于中欧友好日暨中欧环保小使者活动走进欧盟学校的新闻报道. 内容要点 1.中国学生表演了武术书法气功等中国特色项目 2.欧洲学生上演了有关环保的戏剧节目 3.活动的意义. 注意 1.词数100左右开头已写好不计入总词数 2.可以适当添加细节以使行文连贯.参考词汇武术martialarts气功Qigong OntheChina﹣EuropeFriendshipDaymanyChinesestudentsandtheirEuropeanfriendsgottogetherataEU'smiddleschool..
Nobodylikesanoldpoop傻子.Developingasenseofhumorispartofbecomingamatureemotionallyhealthyindividual.Laughterisgoodforthesoulbuildsfriendshipsandrelievesstress.Itservesastheglueforsocialsituationsandasanice﹣breakerforsadnessandboredom.Ifyou'veeverbeentoldtolightenuporchilloutyoushouldsavetheblueattitudeforserioussituationsanddevelopyoursenseofhumor. Forgivetheaccidental.Asuddenfallishumorousnotbecauseweliketoseepeoplefallbutbecauseitsurprises.Fromaspilled溢出waterglassinameetingtoAuntRae'steethcomingoffintheThanksgivingturkeytheembarrassmentofaccidentscanberelievedbyhumorandahelpinghand.Aftermakingsurethatnobody'shurtforgiveaccidentswithachuckle咯咯地笑ratherthanascolding. Lookfortheunexpected.Thekidwhousedtolookatyouwithhiseyesclosedduringatesthadtheidea.Parentswhoservegreeneggsandhamtotheirchildrenongraduationdaygettheidea.Unexpectedactionslightenanatmosphereandrelaxpeople. Learntolaughwithyourkids.Mostofwhatchildrensayanddoisfunny.Helpthemlearnthataccidentsaresometimesfunnyandsometimesoccasionsforjoininginandhelpinganotherhumanbeing.Bysharinglaughsandattemptingtoexplainhumoryoudevelopyoursenseofhumoraswellashelpkidsdeveloptheirownsenseofhumor. 1Ifyou'veeverbeentoldtolightenuporchilloutitmeans. A.youarehumorous B.youareblue C.youlackhumor D.youarefunny 2AccordingtoParagraph2whenyourfriendfallsyoucan. A.laughathim B.chuckle C.scoldhim D.feelembarrassed 3Intheauthor'sopinionifyourmotherservesgreeneggsandhumtoyouonyourgraduationdaysheis. A.boring B.serious C.considerate D.humorous 4Whatisthebesttitleforthepassage? A.HowtoDevelopaSenseofHumor B.WaystoBecomeaHealthyIndividual C.TheFunctionofHumor D.ProperAttitudesTowardHumor
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Writeagoodinterestingblog Ifyouwanttoavoidbeingfrustratedforwritingablogthatwasneverreadherearesomewaystomakeagoodinterestingblog. 1CBoringtopicsaregenerallynotgoodforblogsunlessyouaregeniuswriterswhocancreatebeautifulprose散文evenwhenwritingaboutthemostordinarythings. Pickatopicyouknowandarepassionateabout.2EIfyoulikevideogamesforexamplewriteonedetailingyourexperiencesofplayingthem.NotethatthiskindofblogisdifferentfromaDearDiaryblog. Avoidwritingyourownbiography.ADearDiaryblogisn'tinterestingtootherpeopleunlessyouareareallysignificantperson.Thinkaboutitwhowouldreallywanttoknowwhatyouatefordinner?Thiskindofblogisself﹣indulgent放纵自己的andunnecessary.3A Funnyblogpoststendtobecomevital.Humorouschartspicturesandvideosaregreatsupplementstoyourtext.4GTrytothinkofuniquethingstowriteaboutorwriteanopposingviewonacertainsubject. 5DPeoplehatebeingled﹣onandtrickedintoreadingablogpostthattheyexpecttobehelpfuljusttorealizethatitisasubjectiveandpromotionalone. A.Itdoesnotofferanythingtothepeoplereadingit. B.Writeyourblogaboutyourpersonalthings. C.Chooseaninterestingtopic. D.Informyourreadersfromthebeginning. E.Itshouldbeonethatotherpeoplecanrelateto. F.Writeyourblogclearly. G.Donotrehashorrewriteblogpostsfromfamousblogs.
Somepeoplelikemodernart1otherssaythatisrubbish.Butacleanerwho2workintheTateGalleryinLondonisn'tabletotellthe3different.Thewomanwhosenameisn'tknownmistookaworkofartbytheGermanpainterGustavMetzger4abagofrubbishandthrew5outwithotherbags.6plasticbagwhichcontainedpiecesofpaperandcardboardwas7laterecoveredoutsidethegallerybuttheartistthoughtthatitwastoo8damagetobeputonshowagain.78﹣year﹣oldMr.Metzgerexplainedthattheexhibit9hesaidwasacopyofasimilarworkhehadcreatedin196010meantoshowthatallartistemporaryandfinite.
Whatabusyday!Thethreeboyswerefedbathedandchangedintotheirnightclothes.Maryhad1themastoryandfinallytheywereasleep.Babysitting照看thethreeboysagedeightsixandfourisextremely2shethought. SleepsheconsideredifonlyIcould！Butshehaddifficulthomeworktocomplete.Leaningbackshe3herfeetontothesofatogetcomfortable.Whoeversaidbabysittingwasan4waytomakemoneyobviouslyhadn'tmetthethreeboysshethought.Thetelevisionwasontheroomwaswarmandthelightsweredim.Mary's5feltheavierandheavier.Imustn'tsleepshethought﹣whichwas6whatshedidofcourse. Strangelyenoughshesoon7thatshewasaworldfamouschef主厨.Shemadea8andworediamondsanddesignerclothes.Mostdayssherelaxedbythepoolmeetingtherichandfamousor9﹣herfavoritehobby.She10tooktheleadingroleinherownTVshow. Thatisuntilshebecametoo11.Iamdefinitelythebestintheworldshethoughtasshepreparedatastychickendish.But12seemedtogoright.Shespilttheflourshedroppedaneggandshecutherfinger.Despiteallthetroublesshe13togetthechickenintothestove.Soonsmokeblanketedtheroom.Thechickenwasonfire.14setinbutMarycouldnotrun﹣shewas15tothespot.Shetriedhardtomovebutcouldnot16asharpsoundawokeher. Shegotshockedandconfused﹣17waspouringfromthekitchen.Rushingtoinvestigateshewasmetbythree18littlefacesandsomeveryburntbread.Sorrywewerehungryandyouwere19sowetriedtomakesomebreadexplainedaboy.RelievedMarymadethemasnackandsentthembacktobed.She20themnevertofallasleeponthejobagain! 1A.given B.written C.told D.taught 2A.successful B.helpful C.tiring D.surprising 3A.shook B.put C.bent D.kept 4A.difficult B.boring C.important D.easy 5A.eyes B.mind C.heart D.legs 6A.nicely B.exactly C.curiously D.carelessly 7A.realized B.reminded C.learnt D.dreamt 8A.decision B.fortune C.business D.plan 9A.cooking B.reading C.running D.babysitting 10A.just B.ever C.even D.only 11A.selfish B.proud C.stubborn D.sensitive 12A.everything B.something C.anything D.nothing 13A.tried B.arranged C.managed D.prepared 14A.Panic B.Pain C.Noise D.Stress 15A.frozen B.dragged C.pushed D.brought 16A.because B.until C.as D.unless 17A.smoke B.light C.water D.fire 18A.cheerful B.strange C.guilty D.confident 19A.busy B.hungry C.worried D.asleep 20A.promised B.allowed C.expected D.persuaded
InChinathehistoryofpeopleplantingandusingbamboocandatebacktoasfaras7000years.AsearlyastheShangDynastybamboowasbeingusedinancientpeople'sdailylives.Itwasusedforfoodclothinghousingtransportation1musicinstrumentsandevenweapons. The2applyofbambooinscienceandtechnologyisthrilling.In251BCLiBinginSichuan3leadthelocalpeopleinbuildingtheDujiangWeirs都江堰thefirstirrigationnetworkintheworldinwhichbambooplayed4importantrole.Theworld'soldestwaterpipewasalso5makeofbamboo.DuringtheHanDynastythepeopleinSichuan6successsanka1600﹣metre﹣deepwellwiththickbambooropes.ThistechnologydidnotspreadtoEurope7the19thcenturyanditwasbyusingthetechnology8theAmericansdrilledthefirstoilwellinPennsylvaniain1859. InChineseculturebambooiswell﹣knownas9ofthefourgentlemeninplants.Tomanyfamousmenbambooisasymbolofgoodnessandhonesty.Itisalwayscloselyrelatedtopeopleofpositivespirits.Bambooculturecontributestoencouragingpeopletoholdonwhen10facetoughsituations.
Myfatherwasalwaysagoodgardener.Oneofmyearliestmemoriesisstandingwithoutshoesinthefreshlytilled翻耕的soilmyhandsblackenedfromdiggingintheground. AsachildIlovedfollowingDadaroundinthegardenIrememberDadpushingthetiller耕作机aheadinperfectlystraightlines.Dadlovedgrowingallsortsofthingsyellowandgreenonionswatermelonsalmostasbigasmerowsofyellowcomandourfavorite﹣redtomatoes. AsIgrewintoateenagerIdidn'tgetsoexcitedaboutgardeningwithDad.Insteadofmagicallandofpossibilityithadturnedintosomekindofprison.AsDadgrewolderhisloveforgardeningneverdisappeared.AfterallthekidsweregrownandhadstartedfamiliesoftheirownDadturnedtogardeninglikeneverbefore.Evenwhenhewasdiagnosedwithcancerhestilltookcareofhisgarden. Butthenthecancerbitbybitinvadedhisbody.Ihadtodothethingsheusedtodo.WhatreallyconvincedmethatDadwasdyingwasthestateofhisgardenthatyear.Therowsandrowsofmulticoloredvegetablesweregone.Tootiredtoweedthemhesimplyletthembe.Heonlyplantedtomatoes. ForthefirstfewyearsafterhediedIcouldn'tevenbeartolookatanyone'sgardenwithouthavingstrongmemoriespourovermelikecoldwaterfromabucket.ThreeyearsagoIdecidedtoplantmyowngardenandstartedoutwithjustafewtomatoes.ThatmorningafterbreakingupafairamountofsoilsomethingcaughtthecomerofmyeyeandIhadtosmile.Itwasmyeight﹣year﹣oldsonNathanhappilyplayinginthefreshlytilledsoil. 1Whydidtheauthorlikethegardenwhenhewasachild? A.Thegardenwasplantedwithcolorfulflowers. B.Thegardenwasjustfreshlytilledbyhisfather. C.Helovedwhathisfathergrewinthegarden. D.Heenjoyedbeinginthegardenwithhisfather. 2Whenallthekidsstartedtheirownfamiliestheauthor'sfather. A.devotedmoretogardening B.turnedtootherhobbies C.stoppedhisgardening D.focusedonplantingtomatoes 3Whathappenedtothegardenwhentheauthor'sfatherwasseriouslyill? A.Theauthor'ssontookchargeofit. B.Noplantgrewinthegardenatall. C.Thegardenwasalmostdeserted. D.Itbroughttheauthoragreatharvest. 4Wecaninferfromthelastparagraphthat. A.theauthor'ssonplayedhappilyinthegarden B.theauthor'ssonremindedhimofhisownfather C.theauthor'ssonwasverygladtohelptheauthor D.theauthor'ssonwillcontinuegardeningaswell
TheiPhonetheiPadeachofApple'sproductssoundscoolandhasbecomeafad一时的风尚.Applehascleverlytakenadvantageofthepoweroftheletteri﹣andmanyotherbrandsarefollowingsuit.TheBBC'siPlayer﹣whichallowsWebuserstowatchTVprogramsontheInternet﹣adoptedthetitlein2008.Alovelybear﹣popularintheUSandUK﹣thatplaysmusicandvideoiscallediTeddy.Aslimmed﹣downversionofLondon'sIndependentnewspaperwaslaunchedlastweekunderthenamei. Ingeneralsingle﹣letterprefixes前缀havebeenpopularsincethe1990swhentermssuchase﹣mailande﹣commercefirstcameintouse. MostiproductsaretargetedatyoungpeopleandconsideringthemajorreadersofIndependent'siit'snosurprisethatthey'veselectedthisfashionablename. Butit'shardtoseewhat'ssospecialabouttheletterIWhynotuseaborcinstead?AccordingtoTonyThorneheadoftheLanguageCenteratKing'sCollegeLondoniworksbecauseitsmeaninghasbecomeuncertain.WhenAppleusesinooneknowswhetheritmeansInternetinformationindividualorinteractive.ThornetoldBBCMagazines.EvenwhenApplecreatedtheiPoditseemsitdidn'thaveonecleardefinitionhesays. HoweverthankstoApplethetermisnowassociatedwithportability轻便addsThorne. ClearlytheletterIalsoagreeswiththeideathattheWesternWorldiscenteredontheindividual.Eachpersonbelievestheyhavetheirownneedsandwelovepersonalizedproductsforthisreason. AlongwithGoogleandblogreadersofBBCMagazinesvotediasoneofthetop20wordsthathavecometodefinethelastdecade. Butashistoryshowspeoplegrowtiredoffads.Fromthe1900sto1990sproductswith2000intheirnamesbecamefashionableastheyearwasassociatedwithallthingsadvancedandmodern.Howeverasweenteredthenewcenturythetrendinevitably一定的disappeared. 1PeopleuseiPlayertoC. A.listentomusic B.makeacall C.watchTVprogramsonline D.readnewspapers 2WecaninferthattheIndependent'siisaimedatA. A.youngreaders B.oldreaders C.fashionablewomen D.engineers 3NowadaystheitermoftenremindspeopleoftheproductswhichareA. A.portable B.environmentallyfriendly C.advanced D.recyclable 4ThewritersuggeststhatB. A.iproductsareoftenofahighquality B.thepopularityofiproductsmaynotlastlong C.theletterbreplacesletteritonametheproducts D.iTeddyisalivebear.
Theselfieisusedtodescribetheself﹣takenphotooftenfromasmartphone.Someonetakesabout10selfieseachtimehedoesandheonlyendsup1postingpostoneortwoofthose.Hepickstheonethathefeelsmakehimlookthe2bestgood.Inthatpicturehegainsconfidence.Forthatmomenteverythingbadorterriblethathashappenedtohim3isremovedremovebecausethatsmileiswhatgiveshimthe4determinationdeterminetolovehimself. Iread5apoemrecentlyandtheyoungmansaidIfIaskyou6whatyoulovetheanswerswillmostlikelyrolloffyourtongue.Youlovetoread.Youlovetowrite.Youloveyourmomyoudaughteroryourbestfriend.Howlongdoyouthinkyoucangoonandonbeforeyousay‘Ilove7myselfI'? Thatstatementhitmelikeatonofbricks.I'vestruggledwithconfidenceallmylife.Istilldo.Andin8nowayamIsayingthattakingaselfieisagateway9toconfidence.10However/Rather/Insteadtheselfiedoesdeservesomecreditforallowingindividualstoexpressthemselves.
假定你是李华在高三毕业典礼之际学校号召毕业生用适当形式表达对学校及老师的感恩.请你给你的外籍教师Megan写一封信表达你对她的感谢要点如下 1.你在学习英语中经历的困难 2.获得Megan老师的帮助和鼓励 3.对Megan老师的感谢和祝福. 注意1.词数100左右 2.可以适当增加细节以使行文连贯 3.开头语已为你写好. DearMegan Howtimeflies! Yourssincerely LiHua
Whatisashopaholic购物癖? 1Whilethemediasometimesusethewordcasuallyshopaholicssufferfromarealandsometimesveryfrighteninglackofself﹣control. Withoutadoubtweliveina‘spend﹣happy'society.Mostpeoplelivebeyondtheirmeansandareindebt.2Theytakeweekend﹣longshoppingexcursionsspendmoneytheydonothaveandoftenregrettheirpurchasesthenextday.Butdoesthismeanthattheyhaveaproblem?Notnecessarily. Trueshopaholicsshopbecausetheycan'thelpit.3Theyshopwhentheyarefeelingdepressedandusespendingasawayofcopingwiththeworld.Theydonotshopbecausetheyenjoyitorbecausetheyneedthethingstheybuy.Theybuythingsbecausetheyfeeltheyhaveto.4 Twopiecesofadvicegiventoshopaholicsarethese.Firstlywhenyougoshoppingonlytakecash.Leaveyourcreditcardsandcheckbooks支票簿athome.Andsecondlyifyouseesomethingthatyouwanttobuydon'tletyourselfbuyitonthespot.5Ifyoustillwanttheitemafewdayslaterthenyoucangobackandbuyit. A.Nowadaystherearemoreandmoreshopaholicswhichhasbecomeamajorconcernforthesociety. B.Insteadgiveyourselfa‘waitingperiod'. C.Inrecentyearsshopaholicshavecometothepublicattentionontelevisionandinnewspaperandmagazinearticles. D.Theygoonbuyingthingslongaftertheyhavehugedebts. E.Remindyourselfthatyouareashopaholic. F.Manypeoplewhatevertheirlevelofincomethinkofshoppingasahobby. G.Ashopaholicisoutofcontrol.
—Wouldyoulikesomemoreapples? —.Ican'teatanymore. A.Nothanks B.I'dliketo C.NoIdon't
IfaskedifspaceexplorationshouldcontinuemostAmericanswouldgiveanimmediateresponseeitherinfavorofcontinuingorinfavorofendingspaceexploration.Acommonresponsewouldbethatspaceexplorationisawasteofmoney.AnaverageAmericanuneducatedonthesubjectmightbelievethatthegovernmentiswastingbillionsofdollarsontheresearchthathasnovalue.Someonestrangetothesubjectmightsaythataspaceshuttlegoesuponceinawhileandthatisaboutallthathappens.Researchisongoingandcontinueswhentherearenoshuttlesbeinglaunched.Thisalsocoststhegovernmentmoney.Doestheextremecostofspaceexplorationmakesense? OneargumentisthatthegovernmentiswastingmoneyontheresearchnotbeingusedonEarth.ActuallythemoneygoestoworkersandscientiststhatsupportNationalAeronauticsandSpaceAdministrationNASNmissionsandgoestomajorcompaniesthatplayimportantrolesinmajorsectorsoftheUSeconomy.BoeingisapartnerofNASAforaircraftthesamecompanythatmakescommercialaircraftfortheairlineindustry. Anotherbenefittocontinuingspaceexplorationisthemanytechnologiesitprovides.Theartificial人造的heartresultedfromexperimentsonthespaceshuttle.ThehandheldJawsofLifeusedtosavevictimsfromcaraccidentsresultedfromthesystemusedtoseparatethespaceshuttlefromitsboosterrockets.Insulation隔热板inhomesthatkeepsthemwarmandenergyefficientisbasedonthetechnologyusedtoinsulatethespaceshuttle. TherearedirectbenefitstotheeconomyprovidedbyNASAmissionsaswellasthosetechnologies.Theseadvancesarefoundinfoodbuildingmaterialsmedicalproceduresandthevehicleswedrive.Whileitcanbeproventhatbillionsofdollarsthatcouldbeusedelsewhereisbeingspentonspaceexplorationthebenefitsitprovidesoutweightheterribleaspects.Asamatteroffactthemoneyspenthelpstoimprovethequalityofourlives. 1HowisParagraph2mainlydeveloped? A.Byofferinganalyses. B.Bymakingcomparisons. C.Bygivingsomeexamples. D.Bypresentingresearchfindings. 2ThefunctionofJawsofLifeisto. A.savepeoplefromtrafficaccidents. B.doexperimentsonthespaceshuttle C.keephouseswarmandenergyefficient D.separatethespaceshuttlefromitsboosterrockets. 3Intheauthor'sopinionspaceexploration. A.haschangedourlifecompletely B.coststoomuchofourtime C.benefitsusinmanyways D.hasnothingtodowithus 4Whatwouldbethebesttitleforthetext? A.Benefitsofspaceexploration B.Isspaceexplorationworththecost? C.Howtomakespaceexplorationaffordable D.MissionsoftheNASAspaceshuttleprogram
Work﹣From﹣Home!AVONishiringnow.Noexperiencenecessary.Unlimitedearningspotential.Beyourownboss!Alllocationsneeded.251﹣518﹣8023www.AvonJob.com 1Theseadsare. A.toselltheirproducts B.toattractsomebodytojointhem C.toinformpeopleofsomeactivities D.tohelppeopleimprovethemselves 2Foragraduatewhojustfinishescollegewhichadismostsuitable? A.Ad1. B.Ad2. C.Ad3. D.Ad4. 3Ifyouarearunnerofasmallcompanyfocusingonwebsiteservicewhichadismostattractivetoyou? A.Ad1. B.Ad2. C.Ad3. D.Ad4.
Whatsomethingtodrink?
HowSuperAreSupermarkets? Buyingeweek'sgroceriesistiring.Youwanttogetitoveranddonewithquicklysoyouheadforthenearestsupermarketyoufindeverythingyouneedunderoneroofandyoufeelgladthatthosedaysofgoinginandoutofdifferentshopsinthehighstreetareover.Supermarketsseemtobeabigplus.Thereisadownsidethough. IntheUK90%ofallthefoodpeopleconsumeisboughtat5differentsupermarketchains.Thismakesthesecompaniesextremelypowerfulwhichletsthemusetheirhugebuyingpowertosqueezesmallsupplierstogetthebestdeal.Milkisagoodexample.Supermarketsliketousethingslikemilkwhichisthetopofalmosteveryone'sshoppinglisttoattractcustomers.Toofferthelowestpricepossibletotheconsumerthesupermarketsforcedairyfarmerstosellmilkatlessthanthecostofproduction.Supermarketsguaranteetheirgoodprofitswhilefarmersareleftstrugglingtomakeendsmeetandthetaxpayerpaystosupportthesystemwithoutevenknowingit. Itwouldbeniceiflocalgrocerssupportedlocalagriculture.Butforthebigsupermarketsthisjustdoesn'tmakesense.Supermarketsdon'twantlittlefarmersthinkingtheycandecideprices.Sosupermarketshavestartedaglobalsearchforthecheapestpossibleagriculturalproduce.Inmanysupermarketsitisdifficulttofindanythingwhichisproducedlocally. UKfarmersusedtogrowalotofapples.Notanymore.In199936%ofappleswereimported.By2015thefigurehadrisento80%andthedomesticproductionofappleshadfallenbytwothirds.TheconsumermightjustbehappytogetareasonablypricedmealmadeupoffoodsfromThailandSpainItalyandZambiabutweshouldalsobearinmindtheInfluenceonlocalproducers. Thenthere'spackaging.Supermarketslikeeverythingtobepackedandwrappedsoitcanbepiledneatlyonshelves.Supermarketsproducenearly10milliontonsofwastepackagingintheUKeveryyearofwhichless5%isrecycled.Somesupermarketsmakesurethatlargerecyclingbinsareobviousintheircarparksshowingthattheyareenvironment﹣friendly.Butthatisjustanimage. Whenanewsupermarketisplannedthereareclaimsaboutthenumberofnewjobsthatwillbecreated.Unfortunatelythenumberofjobslostintheareaislargerthanthenumberofnewpositionsinthesupermarket.Onaverageeachnewsupermarketleadstothelossof276jobs. Howeverthemodernworldisallaboutshoppingandthefreedomtobuywhateveryouwhatsoitwouldbeimpossibletostoppeopleshoppingatsomeparticularkindofshop.Butsomemeasuresdoneedtobetakenwhensmallsuppliersloseprofitslocalproducerssuffersealevelsriseandjobsarelostanywaywecan'tjustcareaboutafreecarparkandspecialoffers. 1Theauthormentionsmilkinparagraph2toexplainhowsupermarkets. A.cheatthetaxpayers B.supportlocaldairyfarmer C.harmsmallsuppliers‘benefits D.providecustomerswiththecheapestproduct 2Accordingtothepassagesupermarketskeeppriceadvantageby. A.competingagainsteachother B.importingforeignproducts C.purchasinglocalproducts D.reducingproducttax 3Whichofthefollowingshowsthestructureofthepassage? CPCentralPointPPointSPSub﹣pointCConclusion 4Whatistheauthor'sattitudetowardssupermarkets? A.Critical B.Sympathetic C.Doubtful D.Cautious
—Wouldyoulikeicecreamsir? —Yesplease. A.some B.much C.many
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. LastSundayitwasmyfather'sfunnyday.Aftersuppermyfatherwenttoseethefilm.Butinoursurprisehecamebackjustabouthalfanhourlater.Iaskedhimwhatwasthematter.Hesmiledandtoldusaboutthefunnythingwhathadhappenedinthecinema.Hewassittinginhisseatwhileawomancametoherandsaidtheseatwashers.Surprisingtheylookedattheirticketcarefullyonlytofindtheseatsshownintheirticketswerethesamewhilethecolorsweredifferent.Sotheylookedattheticketsmorecarefully.AfterawhilemyfatherapologizedthewomansayingSorryImakeamistake.Takethisseatplease.Thefactwasthathisticketfoundoutinhisdeskdrawerwasforthefilmamonthago.
Don'tbringfoodtotheparty.IfyouI'lltakeitaway. A.are B.willdo C.do
—shoeswouldyoulike?—Size40.A.What B.Whatkindof C.Whatsize
GeneticallyModifiedGMfoodisunfortunatelybecomingmorepopularamongstfarmersandfoodprocessors.Cropsarebeinggeneticallymodifiedtoresistinsectsplantdiseasesinsecticides杀虫剂.Plantsarealsomodifiedtolookbiggerandbetter.Unfortunatelytheendgoalisn'tprovidingnutritionforpeopleit'stoincreaseprofitmarginsandtomakefoodlookbetter.Infactmanymodernfruitsandvegetablesaretwicethesizeofwhattheyusedtobewhilehavingfarlessvitaminsandnottastinggoodeither.Nowresearchisshowingthatgeneticallymodifiedfoodmightevenbebadforyou. GMorganismsareorganismsthathavegenesinsertedintotheirDNAinordertooffercertaincharacteristics.Inthiswayyoucanmakeitbetterormakeitlastlonger. JeffreyM.SmithhaspublishedastudyaboutthedangersofGMfood.ItwasdiscoveredthatwhenGMsoywasfedtofemaleratstheyfoundthatalltheiryoungdiedwithin3weekscomparedtoanatural10%deathrate.Theiryoungwerealsobornsmallerandtheylaterhadproblemsbecomingpregnant.Astudyofpigsfoundthattheyalsobecameinfertile不育aftereatingGMcorn. ManypeopleareeatingGMfoodwithoutevenrealizingit.Thesolutiontothisproblemissimple.Humanbeingsexistedintheircurrentformforhundredsofthousandsofyears.Formostofthattimeweateadietconsistingofmeatfruitvegetablefisheggsandnuts.Thisisouroptimaldietwhichleadsustoliveahealthyandlonglife.Butoverthelast30yearsNorthAmericahasexperienceddiabetescancerandheartdisease.AllduetothemisinformationprovidedbygroupswhoworkonbehalfofthemanufacturersofGMfood.Thewaytoavoidobesityheartdiseaseandcancerisbyeatinglikeourstone﹣ageancestors. 1AccordingtotheauthorwhatultimatelyinspiredthepopularityofGMcrops?C A.Richnutrition. B.Uniquetaste. C.Highprofits. D.Energysaving 2Whathadwebetterdoifwewanttostayhealthyaccordingtothetext?D A.Eatmorefruit. B.Bevegetarians. C.Eatmoregrains. D.Keeptraditionaldiet. 3ThetextisorganizedintheformofB. A.timeandevents B.causeandeffect C.reasoningandargument D.contrastandcomparison 4WecaninferthatthelobbygroupsinParagraph4arepeoplewhoareC. A.scientistswhogiveoutfalseinformationbecauseofcarelessness B.doctorswhotrytoprofitfrompatientswhosufferfromunhealthyfood C.workerswhotrytocheatcustomersforthebenefitsoffoodproducers D.agriculturaltechnicianswhoareresponsibleforpromotingnewproduct
Iwouldtogotoseethemoviethisafternoon.
Hewillgototheparkifheistomorrow.
Thereare12inthecakeyoucanblowthemoutinonego.
Asanyonewhofreelances做自由职业knowstherearelotsofadvantagesofworkingathomealone.Buttherearedrawbackstoolikethepotentialloneliness.Nowonderco﹣workingspacesarebecomingsopopulartheypermitself﹣employedindividualstofeelliketheyarepartofallofficeenvironmentwhilemakingthemgetsomeworkdonetoo.Butrentingaco﹣workingspacedoescostmoney. NowaSwedishprojectisaimingtochangethatbyturningpeople'sunder﹣usedhomesintotemporaryco﹣workingspacesavailabletofreelancersforfree.HofficewasstartedbyfreelancersChristoferGradinFranzenandJohlineZandraaboutayearagoinStockholmwhentheyinvitedafewpeopleintotheirhomeofficetoworktogether.ItwasagreatsuccessandtheprojecthassincespreadtoanumberofcitiesinEuropeNorthandSouthAmericaAustraliaIndiaandJapan.Anyonecansignupandoffertheirhomespaceasafreeco﹣workingspaceorgofindaHofficenearthem. OnaHofficedayeveryonearrivesandstartsworkatacertainhour.After45minuteseveryonegetsuptotakeabreakstretchdoqigongoryogafor10to15minutes.Afterwardspeoplecangatheraroundagainandre﹣statetheirintentionsandgoalsfortherestoftheworkdayasawaytomotivateeachother.Mealscanbeeatentogetheratacertainhourpotluck﹣style家常饭orbybringingyourownlunch. Thisprocesscreatesanencouragingandsupportiveworkenvironment.AssomefreelancersdescribeByworkingatHofficewegiveourselvesandeachotherthegifttospendourdaysinasocialworkingenvironmentwhereweareextremelyproductivewithoutignoringourotherhumanneeds.Wealsomakesuretogiveusandeachotherwhatweneedtofeelcalmhappyinspiredandcreativeduringtheworkingday. SoHofficeisnotjustaboutsharingspaceit'salsoaboutafreeexchangeofideas.AndperhapsthebestthingisthatHofficesarefreetouse. 1Hofficewasstartedto. A.changepeople'sattitudetowork B.encouragepeopletobemoresocial C.improvepeople'sworkingconditions D.provideaco﹣workingspaceforfree 2What'sthemainideaofParagraph3? A.HowpeoplerespondtoHoffice. B.HowaHofficedayworks. C.WhatpeopleshareatHoffice. D.WhatHofficemeanstopeople. 3Somefreelancers'descriptionsofHofficesuggestthatthey. A.benefitalotfromtheworkingstyle B.worklongerthanbefore C.expectmorepeopletojointhem D.can'tbeseparatedfromeachother 4WhatdoweknowaboutHofficeaccordingtothetext? A.Itisbecomingincreasinglypopular. B.Ithasbeenaroundforquiteafewyears. C.Ithascreatedmanynewjobopportunities. D.Itissuitableforpeoplefromallwalksoflife.
假定你是中国高中生李华今年暑假期间将去澳大利亚悉尼南部Kogarah的一所综合性学校KogarahHighSchool学习一个月并将寄宿在当地的居民Silvia家中.请给Silvia写一封电子邮件询问一些将在Kogarah生活的有关情况.具体询问内容如下 1.住宿是否可以有单间2.房间里是否有网络 3.是否可以自己煮饭4.是否有便利的交通. 注意1.词数100左右 2.可适当增加细节以使行文连贯. 3.开头语和结束语已为你写好不计入总词数. DearSilvia GreetingsfromChina!IanLiHuaahighschoolstudentinChina.. Lookingforwardtoyourreply. Bestwishes. Yourssincerely LiHua.
Iofteneatsomeandforlunch.A.tomato;fish B.tomatoes;fish C.tomato;fishes
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