首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
下列离子的VSEPR模型与离子的空间立体构型一致的是（ ）
查看本题答案
包含此试题的试卷
高二下学期化学《》真题及答案
点击查看
你可能感兴趣的试题
下列分子或离子中VSEPR模型名称与分子或离子的立体构型名称不一致的是
CO
2
H
2
O
CO
CCl
4
下列分子和离子中中心原子VSEPR模型为四面体形且分子或离子空间的构型为V.形的是
NH
4
+
PH
3
H
3
O
+
OF
2
用VSEPR模型预测下列分子或离子的立体结构其中正确的是
CH4 正四面体形
BCl
3
三角锥形
CO
2
平面三角形
SO
2
直线形
2.00分下列关于价层电子对互斥模型VSEPR模型的叙述中不正确的是
VSEPR模型可用来预测分子的立体构型
分子中价电子对相互排斥决定了分子的立体构型
中心原子上的孤对电子也要占据中心原子周围的空间并参与互相排斥
分子中键角越大，价电子对相互排斥力越大，分子越稳定
下列粒子的VSEPR模型为四面体但空间立体构型为V.形的是
OF
2
CO
2
SO
2
NH
4
＋
下列分子或离子中VSEPR模型名称与分子或离子的立体构型名称不一致的是
CO
2
H
2
O
CO
3
2
﹣
CCl
4
已知[CoNH36]3+的μ=0则C03+杂化轨道的类型是配离子的空间构型是配离子的空间构型是
下列分子或离子中VSEPR模型名称与分子或离子的立体构型名称不一致的是
CO
2
H
2
O
CO
3
2﹣
CCl
4
下列分子和离子的中心原子的价层电子对几何构型为四面体而分子或离子的空间构型为V.形的是
NH
4
+
PH
3
H
3
O
+
H
2
S
下列分子的VSEPR模型与分子立体结构模型一致的是
NH
3
BCl
3
H
2
O
PCl
3
下列分子或离子中VSEPR模型名称与分子或离子的立体构型名称不一致的是
CO
2
H
2
O
CO
CCl
4
根据价层电子对互斥模型判断下列分子或者离子的空间构型不是三角锥形的是
PCl
3
HCHO
H
3
O
＋
PH
3
下列分子或离子中中心原子价层电子对互斥模型为四面体型且分子或离子空间构型为V.形的是
NH4＋
ClO3－
H3O＋
H2S
下列离子的VSEPR模型与其立体构型一致的是
SO
ClO
NO
ClO
下列微粒中心原子的VSEPR模型为四面体但空间立体构型为V.形的是
OF
2
CO
2
SO
2
NH
4
＋
用VSEPR模型预测下列分子或离子的立体结构其中正确的是
CS
2
为V.形
HCN为V.形
NH
为正四面体形
PCl
3
为平面三角形
ClO－ClO2－ClO3－ClO4－中Cl都是以sp3杂化轨道方式与O.原子成键则ClO－离子的立
根据分子结构与性质相关知识回答下列问题1NH3分子的VSEPR模型为______________SO
用VSEPR模型预测下列分子或离子的立体结构其中正确的是
SO
2
直线形
CO
2
平面三角形
BCl
3
三角锥形
CH
4
正四面体形
ClO－ClO2－ClO3－ClO4－中Cl都是以sp3杂化轨道方式与O.原子成键则ClO－离子的立
热门试题
更多
5分不仅老人可能患心脏病由于缺乏锻炼许多年轻人也因心脏病而病倒.Notonly…
一个质量为2kg的物体同时受到两个力的作用这两个力的大小分别为2N和6N当这两个力的方向发生变化时物体的加速度大小可能为
1.5分Thesituationputusataseriousd不利.
25分假定你是中学生李华在校报英语专栏看到了学校英语文化节的一则招募启事请阅读启事并根据写作要点和写作要求写一封应征邮件. 写作要点: 表达写信意图;陈述应征目的;说明应征条件性格能力等 写作要求: 邮件词数100左右:;开头和结尾部分已写好不计入总词数 DearMsChen Sincerelyyours LiHua
10分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.错误涉及一个单词的增加删除或修改. 增加:在缺词处加一个漏词符号∧并在其下面写出该加的词. 删除:把多余的间用斜线\划掉. 修改:在错的词下画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处多若从第11处起不计分. ThismorningIwassurfingtheInternetinmybedroomtolookforsomeinformationsformystudy.SuddenlymymotherwasturnedupandshoutedatmethoughtthatIwasplayingacomputergame.Iwasveryangryandarguewithher.Afterthatmyfathercriticized批评meformyrudebehavior.IfeltupsetandhoweverIturnedadeafeartohim.Mymotherwasreallyhurtbuthestilltriedtoforgiveme.NowIfeelratherregretful.MyparentsaresoconcernedonmebutIhurtthem.Iwillbegformymother'sforgive.IthinkIoughtrespectmyparentswhateverhappensinsteadofjustthinkingofmyselfandlosemytemper脾气allthetime.
10分Naturedoesnothurryyeteverythingisaccomplished. ﹣﹣﹣LaoTzu Ifyouareinacitywhereeveryonerushesrealizethatyoudon'thavetobelikeeveryoneelse.Youcanbedifferent.Youcanwalkinsteadofdrivinginrushhourtraffic.YoucanbeonyouriPhoneorBlackberrylessanddisconnectedsometimes.Yourenvironmentdoesn'tcontrolyourlife﹣﹣﹣youdo.I'mnotgoingtotellyouhowtogiveyouastep﹣by﹣stepguidetomovingslower.1 1.Doless. Cutbackonyourprojectsonyourtasklistonhowmuchyoutrytodoeachday.Focusnotonquantitybutonquality.2Savesmallerroutinetasksforlaterinthedaybutgiveyourselftimetofocus. 2.Havefewermeetings. 3Andtheyeatintoyourdayforcingyoutosqueezethethingsyoureallyneedtodointosmallwindowsandmakingyourush. 3.4 Whenyoudotheimportantthingswithfocuswithoutrushtherewillbethingsthatgetpushedbackandthatdon'tgetdone.Andyouneedtoaskyourself:hownecessaryarethesethingsWhatwouldhappenifIstoppeddoingthem 4.Practicemindfulness. Simplylearntoliveinthepresentratherthanthingssomuchaboutfutureorthepast.Whenyoueatfullyappreciateyourfood.Whenyouarewithsomeonebewiththemfully.Whenyouarewalkingappreciateyoursurroundingsnomatterwhereyouare. Trythesethingsout.Lifeisbetterwhenunrushed. 5 A.Starttoputofforcanceltheunnecessary. B.Meetingsareusuallyabigwasteoftime. C.Theworldlikelywon'tendifyoudon'tpassoneoftheexaminations. D.Butherearesomethingstoconsiderandperhapsadopt采纳iftheyworkforyourlife. E.Rememberthequote:ifnaturecangeteverythingdonewithoutrushingsocanyou. F.Pick2﹣3importantthings﹣﹣﹣orevenjustoneimportantthing﹣﹣﹣andworkonthosefirst. G.Giveyourselfmoretimetogetreadyandgetthere.
25分阅读下面短文根据其内容写一篇60词左右的内容概要.Oneofthetoughestthingsaboutbeingahighschoolstudentisthatyouneverseemtogetenoughsleepatnightwhichoftenleavesyounoddingoffduringclasses.Spendingeitherlessthansixormorethanninehoursinsleepingputsyourhealthatrisk.Apopularsolutiontoalackofsleepatnightistotakea'powernap小睡'duringthedaybutdoesthisworkGenerallyspeakingitcanbebeneficial.Researchshowsthatanapintheday﹣﹣﹣evenabriefoneasshortastenminutes﹣﹣﹣canclearyourmindandleaveyouwithincreasedenergyandimprovedproductivity.Herearesomethingsyouneedtoknowtonapcorrectly.Tostartwitheverytimeyoudozeoff打瞌睡duringthedaydoesnotcountasa'powernap'.Thebesttimetotakeapowernapisinthemid﹣afternoonwhenyourenergyleveltendstodecrease.Trytoavoidnapsafter4pmforsleepingtoolateinthedaycanmakeithardertofallasleepatnight.HowlongshouldapowernapbeGrabbing10﹣30minutesofrestisusuallybestforamiddle﹣of﹣the﹣daynap.Youarenotreallygettingestablishedsleepifyounodoffforonlyfiveminutes.Howevernappingmorethan40minutescanleaveyoufeelingsleepierthanwhenyoustartmeaningyou'llhavetogothroughthewholewaking﹣upprocessafteryougointothedeeperstageofsleep.Howeverasrefreshingasitmightbeifyouaregettingenoughsleepatnighttakingapowernapisn'tsuchawisechoice.Thereasonisthatsleepingduringthedaycaninterferewith妨碍yourbody'sbiorhythms生理节奏.Thebraingetsusedtogoingtobedatroughlythesametimeeachnightandgettingupatthesametimeeachdayandyoudon'twanttodisturbthisroutine.
8分Therearemanycelebrationsaroundtheworld.IntheUSAmanyhighschoolsandsomecollegesanduniversitieshaveaspecialcelebrationonceayearcalledHomecoming.FormerstudentsandteacherscomebacktotheschooltoenjoythememoriesoftheirtimethereandthemanyHomecomingactivities.Homecomingmightlastforonlyonedayorforseveraldaysevenoneweek. HighschoolsusuallychooseoneboyandonegirlfromtheseniorclasstobetheHomecomingKingandHomecomingQueen.Thestudentsusuallychooseaboyandagirlwhohavedonegreatestcontributionstotheschool. MostschoolshaveaHomecomingparade游行.Theschoolbandwilloftenleadthewayfollowedbymanydifferentcarsandtrucks. MostschoolsalsohaveafootballgameforHomecoming﹣andofcoursetailgateparties.Atailgatepartyisagroupofpeopledrinkingandeatingaroundthebackortailgateofsomeone'spick﹣uptruck. TherearemanyotheractivitiesthatmightbeapartoftheHomecomingcelebration.Theremightbeaschool﹣widepicniconeday;anotherdaytheremaybeplaysconcertscompetitionsorgamesalldependingonaschool'straditions. Homecomingcelebrationsnearlyalwaysendwithadanceand/oragreatdinner.Theschoolisdecoratedbeautifullyandabandispaidtocomeandplay.Studentsdressup:guysinsuitsandgirlsinbeautifuldresses. 1HomecomingintheUSA. A.isheldonlyinhighschools B.isheldtocelebratethebirthofschools C.mightlastfromonedaytooneweek D.mightbepreparedforstudentsonly 2KingandQueenofHomecomingarechosenaccordingto. A.whatthey'vedonetotheschool B.theirhealthybodies C.theirexcellentgradesinstudy D.theirbeautifulappearance 3AlltheactivitiesmightbefoundattheHomecomingexcept. A.aparade B.afootballgame C.apicnic D.anexam 4Thetailgatepartymeansaparty. A.withexpensivethings B.heldoutdoorswitheatinganddrinking C.havingstarscelebratetogether D.heldattheendofthecelebrations
如图所示水平桌面上叠放着AB两物体均与桌面相对静止不动则B物体受力个数为
8分In1971ayoungmanwhogrewupverypoorwastravellingacrossthecountrytryingtomakeanewstartforhimself.Alongthewayhehadcompletelyrunoutof用光moneyandwasforcedtospendthenightinhiscar.Thiscontinueduntilonemorningafteraweekofsleepinginhiscarhewalkednervouslyintoarestaurantandorderedabigbreakfast. Aftereatinghisfirstgoodmealinweekshefoundhimselflyingtothewaitertellinghimhehadlosthiswallet.Thewaiterwhowasalsotheownerwalkedbehindthechairwheretheyoungmanhadbeensitting.Hebentdownandcameupwitha﹩20billthatlookedasifithadfallenonthefloorandsaidSonyoumusthavedroppedthistheownersaid.Theyoungmancouldn'tbelievehisluck!Hequicklypaidforthebreakfastleftatipboughtgaswiththechangeandheadedwest. Onthewayoutoftownhebegantounderstandwhattheownerdid.Maybenobodydroppedthemoneyatall.MaybethatfellowjustknewIwasintroubleandhehelpedmeinawaythatdidn'tembarrassme.SoIjustmadeapromisetohelpotherpeopleifIcan. Laterheworkedveryhardandbecamearichman.NowhelivesnearKansasCity.Eachyearhegivesawaythousandsofdollars.HeisknownastheSecretSantabecauseatChristmastimeeachyearhepersonallyhandsmoneyouttothoseonthestreetandatrestaurants.Lastyearhegavemorethan﹩50000awayinKansasCity. 1Theyoungmanwastravellingacrossthecountryin1971to. A.lookforagoodrestaurant B.improvehislife C.showhisnewcartoothers D.handoutdollars 2Theunderlinesentenceimpliesthattheyoungmangottoknowthat. A.theownerhelpedhiminawaythatdidn'thurthisfeeling B.Itwasveryhonestoftheownertoreturnhismoney C.Itwasveryluckyofhimtogethislostmoneyback. D.anotherpersonwhohadbreakfastintherestaurantlostthemoney 3Fromtheendofthepassagewecanlearnthat. A.theownerwaspaidbackthemoney B.themanwasnotsuccessfulintheend C.themandidcarryouthispromise D.Santagivethemanmoneyeachyear 4Themessageofthestoryis. A.Doingisbetterthansaying B.Wherethereisawillthereisaway C.Hewhotravelsfarknowsmuch D.Givelovewingsanditmayflyhigher
1.5分Thereisnodifficultyintheworldthatcannotbeo克服.
8分WhenIwasabout12Ihadanenemyagirlwholikedtopointoutmyshortcomings.Weekbyweekherlistgrew:Iwasverythin;Iwasn'tagoodstudent;Italkedtoomuch;Iwastooproudandsoon.ItriedtobearalltheseaslongasIcould.AtlastIbecameveryangry.Irantomyfatherwithtearsinmyeyes.Helistenedtomequietly.ThenheaskedArethethingsshesaystrueornotJanetdidn'tyoueverwonderwhatyou'rereallylikeWellyounowhavethatgirl'sopinion.Goandmakealistofeverythingshesaidandmarkthepointsthataretrue.Paynoattentiontotheotherthingsshesaid.Ididashetoldme.TomygreatsurpriseIdiscoveredthatabouthalfthethingsweretrue.SomeofthemIcouldn'tchangelikebeingverythinbutagoodnumberIcould﹣andsuddenlyIwantedtochange.ForthefirsttimeIgotafairlyclearpictureofmyself.IbroughtthelistbacktoDaddy.Herefusedtotakeit.That'sjustforyouhesaid.Youknowbetterthananyoneelsethetruthaboutyourself.Butyouhavetolearntolistennotjustcloseyourearsinangerandfeelinghurt.Whensomethingsaidaboutyouistrueyou'llfinditwillbeofhelptoyou.Ourworldisfullofpeoplewhothinktheyknowyourduty.Don'tshutyourears.Listentothemallbuthearthetruthanddowhatyouknowistherightthingtodo.Daddy'sadvicehasreturnedtomeatmanyimportantmoments.InmylifeI'veneverhadabetterpieceofadvice.1WhatdoesWeekbyweekherlistgrewmeanA.Weekbyweekshediscoveredmoreshortcomingsofmine.B.Weekbyweekthepaperwasfilledwithmyshortcomings.C.WeekbyweekIwashavingmoreandmoreshortcomings.D.Weekbyweekmyshortcomingsgrewmoreandmoreserious.2WhydidherfatherlistentoherquietlyA.Becausehebelievedthatwhatherdaughter'senemysaidwasmostlytrue.B.Becausehehadbeensoangrywithhisdaughter'sshortcomings.C.Becauseheknewthathisdaughterwouldnotlistentohimatthatmoment.D.Becausehewasn'tquitesurewhichgirlwastellingthetruth.3Whatdidthefatherdoafterhehadheardhisdaughter'scomplaintA.Hetoldhernottopayanyattentiontowhatherenemyhadsaid.B.Hecriticizedherandtoldhertoovercomehershortcomings.C.Hetoldhertowritedownallthatherenemyhadsaidaboutherandpayattentiononlytothethingsthatweretrue.D.Herefusedtotakethelistanddidnotshowanyinterestinit.4WhichdoyouthinkwouldbethebesttitleforthispassageA.NotanEnemybuttheBestFriendB.TheBestAdviceI'veEverHadC.MyFatherD.MyUnforgettableChildhood
1.5分Wewanttoe装备yourchildrenwithsomespecialskills.
8分Anewstudyof8000youngpeopleintheJournalofHealthandSocialBehaviorshowsthatalthoughlovecanmakeadultslivehealthilyandhappilyitisabadthingforyoungpeople.Puppylove早恋maybringstressforyoungpeopleandcanleadtodepression.Thestudyshowsthatgirlsbecomemoredepressedthanboysandyoungergirlsaretheworstofall. Thepossiblereasonfortheconnectionbetweenloveandhigherriskofdepressionforgirlsislossofself.Accordingtothestudyeventhoughboyswouldsaylosethemselvesinaromanticrelationshipthislossofselfismuchmorelikelytoleadtodepressionwhenithappenstogirls.Younggirlswhohaveromanticrelationshipsusuallylikehidingtheirfeelingsandopinions.Theywon'ttellthattotheirparents. DrMarianmKaufmananexpertonyoungpeopleproblemssays15%to20%youngpeoplewillhavedepressionduringtheirgrowing.Tryingromanceoftencausesthedepression.Sheadviseskidsnottojumpintoromancetooearly.Duringgrowingupitisimportantforyoungpeopletobuildbfriendshipsandabsenseofself.Shealsosuggeststheparentsshouldencouragetheirkidstokeepclosetotheirfriendsattendmoreinterestingschoolactivitiesandspendenoughtimewithfamily. Parentsshouldwatchforsignsofdepression﹣eatingormoodchanges﹣andiftheyseesignsfromtheirdaughtersorsonstheyneedtogivehelp.Thegoodnewsisthattheconnectionbetweenromanceanddepressionseemstobecomeweakwithage.Lovewillalwaysmakeusfeelyoungbutonlymaturity成熟givesusachancetoavoiditsbadsideeffects. 1Whichofthefollowingismorelikelytohavedepression A.Youngpeoplewhohaveastrongsenseofselfishness. B.Younggirlswhoalwayshidetheirfeelingsandopinions. C.Youngboyswhoseparentswatchfortheirbehavior D.Carelessparentswhosechildrenaredeepinlove. 2Whatcanbeinferredfromthepassage A.Theolderawomanisthelesslikelysheseemstoloseherselfinromance. B.Lackinglovecanleadyoungpeopletogrowupmorequickly. C.Earlylovemakesyoungpeoplekeepclosetotheirfriendsandparents. D.Parentsshouldhelptheirchildrentobeawareofthesignsofdepression. 3What'stheauthor'sattitudetowardspuppylove A.Confused B.Scared C.Disinterested D.Disapproving 4What'sthemainideaofthepassage A.Puppylovemaybringyoungpeopledepression B.Parentsshouldforbidtheirchildren'slove C.Romanceisatwo﹣edgedswordforadults D.Romanceisgoodforyoungpeople
3分培养一些爱好会使你的生活更充实.enrich
6分IfyouhavealongholidaytospendwherecanyougoHerearefourwonderfulhotelsandcampsitesinEurope. EkiesAllSensesResortChalkidikiGreece Thiscouldbetheperfectretreatforstressedparentswhoneedspoiling.Forastartit'sinlovelyGreecebutthere'snoneedtotakeaferryasit'sonthemainland.Withajubarbesidetheheatedpoolopen﹣airspacalmbeachrestaurantsormealsondemandandsecretbaystoexplorebyboatitmakesforasuper﹣relaxedbreak. •Doublesfrom€88juniorsuitesleeps4from€138anightfamilysuitesleeps6from€272 B&BopenlateApril﹣Octoberi﹣escape.com CasaVicentinaAlgarvePortugal Foraback﹣to﹣naturefeelfamily﹣runCasaVicentinaintheAlgarveisperfect.Builtwithecologicalmaterialsit'sinaprotectedparkareaonanaturallake.Breakfastisaplentifulbuffet﹣andbikesaresuppliedfreeofchargesoyoucangotothebeachorcafesandrestaurants.Accommodationisinbrightlydecoratedroomsorlargersuitescompletewithsmallkitchens. •Roomsfrom€75B&Bwonderfulland.com FairyChimneyInnCappadociaTurkey OlderkidswilllovethefairytalelandscapeofCappadociaandtheexcitementofstayinginacavehotel.TheFairyChimneyInnusedtobepartofacavemonastery修道院.Itsroomsarebeautifulandhomelywithtraditionaldecorationsandtheoccasionalreminderofthemodernworld.Allroomshavecourtyardsoverlookingtheextraordinarylandscape. •Roomsfrom€55B&Bplus11perchildfairychimney.Com CasaSanGabrielUmbriaItaly CasaSanGabrielisasmallhilltopfarmwherethreeself﹣cateringcottagesshareaswimmingpoolplaygroundandbarbecue.There'saddedexcitementforyoungguestsinthefamilyofalpacas羊驼keptonsite.ThereareseveralwaterwildlifeandactivityparksnearbyandslightlyfurtherafieldaPinocchiothemepark. •AweekatIIFienilecottagesleeps4﹣6costsfrom€650B&Blowseasononlyfrom€95casasangabriel.com 1IntheEkiesAllSensesResortyoucanenjoy. A.aferryjourney B.anopen﹣airspa C.livingintreehouses D.dancingintheplayground 2Whichofthefollowingwillyouchooseifyouwanttoenjoyabreakfastbuffet A.TheEkiesAllSensesResort. B.CasaVicentina C.TheFairyChimneyInn D.CasaSanGabriel 3Ifyouwanttoseesomewildlifeonholidaywhichwebsiteshouldyouclick A.i﹣escape.com B.wonderfulland.com C.fairychimney.com D.casasangabriel.com
15分Makingreadingahabithasagreatinfluenceonone'slife.BeingraisedinafamilyofteachersI1getplentyofchancestoconnectwithliteraturesinceayoungage.SoIhavemanystoriesaboutmeandreading. Itwasmyfatherwhotookmeontheroadtoreadingandmademeappreciate2itbeauty.WhenIwasalittlegirlheboughtmeabook3nameTheRomanceoftheThreeKingdoms. Iwastooyoungtoreadthisdifficultworksomyfatherexplainedittome4patient.FromthenonIstartedtoenjoyreadingbooks. WhenIbecameamiddleschoolstudentIbegantoreadsomesimplifiedEnglishclassicsonmyown.SometimesIwouldwritedownmythoughtsand5feelandsharethemwithmyfather. AmongallthebooksthatIreadduringmymiddleschoolyearsJaneEyreleftthe6deepimpressiononme.IwashavingsomedifficultieswithmystudiesatthattimebutJaneEyre'spersistenceandcourageinspiredmealot.ThankstomyreadinghabitImanaged7overcomethedifficultiesofmystudies. NowI'maseniorhighschoolstudentandverybusywithmystudies.ButIstillkeeponreadinginmysparetime.MymothertoldmethatIshouldbeabsorbed8mystudiesbutinmypointofviewIregardreadingas9oasis绿洲thatcanmakemerelax. RecentlyIthoughtaboutthebenefits10readingcouldbringus.Readingcanclearourmindsandmotivateus.Inadditionwemaybroadenourhorizonsandgainmoreknowledgethroughreading.Ihopethatmystorycaninspireyoutostartyourownreadingadventure.
25分假如你是李华.想邀请你的朋友Eric一起参加学校绘画俱乐部组织绘制风筝的活动.请你给他写封邮件.内容包括: 1.活动时间地点; 2.需要带的工具. 注意:1.词数:100左右; 2.可以适当增加细节以使行文连贯. DearEric Yourssincerely LiHua
某物体由静止开始运动它所受到的合外力方向不变大小随时间变化的规律如图所示则在0～t0这段时间
1.5分Iamunconcernedwithquestionsofrzōng jiāo ormorality.
4分全副武装的警察总在__后最先到达现场的人群之中.among
8分YouAreWhatYouEatGeneticengineeringisthescientificchangeofthegeneticmaterialinalivingorganism.Itallowsscientiststoidentifyspecificgenestoremovethemfromanorganism'schromosomes染色体improvethemanalyzethemandpossiblyclonethemandtothenreinsertthechangedgeneintotheoriginalorganismoracompletelydifferentorganism.Unliketraditionalbreeding繁殖whereadesiredqualitywouldbebredwithinthesamespeciesgeneticengineeringcaninsertdesiredonesintoorganismsofdifferentspecies.Wow﹣﹣DidyoucatchthatGeneticengineeringcreatesmanypositivecontributionstoagriculture.ForexamplebygeneticallyengineeredGEfoodsanti﹣canceragentsmineralsandvitaminscanbeincreased.Improvedtasteshelflifeandbettertransportareallpossible.AlsoGEplantscanincreasepestandbacterialresistancethereforemakingthefoodsafeforconsumers.Butsomearguethatthepossiblenegativeeffectsoutweighthepositivesandcriticsarestartingtovoicetheirconcerns.UnlikeEuropeintheUnitedStateslabelingisnotrequiredongeneticallyengineeredfoodsoronfoodsthatcontaingeneticallyengineeredproducts.MostAmericansdonotrealizethattheyareinfacteatingGEfoods.Thepublicisalsoconcernedabouttheunknownhealthrisks.Withlimitedunderstandingofgenesscientistscannotpredictpossibleeffects.BecausemostgenesintroducedintoGEplantscomefromsourcesnotintroducedintothehumanbodyitisimpossibletoknowiftheywillcausereactions.Moreoverduetothelackoflabelingifallergies过敏developitwillbeextremelydifficulttofindtheoriginofthem.Thereisalsoamajormoralquestioninmanyminds.Formanytheconflictisnotifitissafeornotbutitdisturbsthembecauseitisunnaturalandunnecessary.Wearecurrentlyproducingoneandahalftimestheamountoffoodneededtofeedtheworldyetoneinsevenpeoplearestarving.GEfoodisunnecessaryandfailstoaddresstherootofhunger.Manybelievethattheonlypeoplewhowillbenefitarethecorporationsthatproduceit.ScientistscannotforeseethepossibleeffectsofGEfoodsyetweeatthemeverydaywithoutevenknowingit.WealreadyhaveenoughfoodsowhycreatemorethatcouldbepotentiallyharmfultoustotheEarthandtoallwildlifeIthinkthatthebenefitsareamazingbutuntilweknowforsurehowthesefoodswillaffectustheyarenotworththerisk.1Accordingtothepassagetraditionalbreedingisdifferentfromgeneticengineeringbecause.A.traditionalbreedingchangesthegenesinthesamespeciesB.traditionalbreedingchangesthegenesindifferentspeciesC.traditionalbreedingtakesplacewithinthesamespeciesD.traditionalbreedingismorescientific2'Thelackoflabeling'inParagraph4indicates.A.informationconcerninggenesourcesisunavailabletocustomersB.itiscurrentlypossibletofindtheoriginsofsomeallergiesC.scientiststrytohidepotentialdangersfromcustomersD.theUSgovernmentisresponsibleforGEfood3AccordingtoParagraph5GEfoodisunnecessarybecause.A.itwon'thelpsolvetheproblemofhungerintheworldB.therearepotentialdangersinproducingGEfoodC.we'renowproducingmorefoodthanbeforeD.customerswillbenefitfromGEfood4Whatistheauthor'sattitudetowardsgeneticengineeringA.Welcoming.B.Disapproving.C.Unconcerned.D.Optimistic.
10分HowtoStudySmarterNotHarderHerearesomeofourfavoritestudytipsthatwillhelpanystudentstudysmarternotharder:Reciteasyoustudy.Reciting﹣sayingthingsoutloudshouldfirsttakeplaceasyoureadthrougheachparagraphorsection.Testyourself.Thiswillhelpyoutounderstandaswellaslearnfasterbecauseitismoreactivethanreadingorlistening.1Takefullernotes.Notesshouldbeinyourownwordsbriefandclear.2Writingnoteswillhelpyoubetterthanjustunderliningasyoureadsinceitforcesyoutorewriteideasinyourownwords.3Thebesttimetoreviewissoonafteryou'velearnedsomething.Youaremorelikelytorememberthematerialatthebeginningandtheendofthelessonsomakesureyoufocusonthemiddlewhenyoureview.Sleeponit.4It'seasiertoremembermaterialyou'vejustlearnedaftersleepingthanafteranequalperiodofdaytimeactivitybecauseyourbraincontinuestothinkevenafteryou'vefallenasleep.Combinememoryandunderstanding.Therearetwowaystoremember:bymemorizingandbyunderstanding.Multiplicationtablestelephonenumbersandmathformulasarebetterlearnedbyrote死记硬背.5Themorewaysyouhavetothinkaboutanideathemoremeaningsitwillhave;themoremeaningfulthelearningisthebetteryoucanrememberit.Payattentiontosimilaritiesinideasandconceptsandthentrytounderstandhowtheyfitinwiththingsyoualreadyknow.Neverbesatisfiedwithanythinglessthanacompletelyclearunderstandingofwhatyouarereading.Ifyouarenotabletofollowthethoughtgobacktotheplacewhereyoufirstgotconfusedandtryagain.A.Studythemiddle.B.Focusonthebeginning.C.Theyshouldbetidyandeasytoread.D.Butreadingisasimportantasreciting.E.Ideasarebestlearnedbyunderstanding.F.Studybeforegoingtobedunlessyouareverytired.G.Itwillalsohelpyoutonoticeyourmistakesandthetopicsyouhavetroubleunderstanding.
15分ABiteofChinaNotripwouldbecompletewithoutexperiencingthelocalfoodculture.1actualChinahasvariouskindsofdeliciousfoodincludingawidevarietyoflocalsnacks.WithoutadoubtforthemajorityoftheforeignersIcontactedandmyself2includePekingDuckDimSumMongolianHotPotwerethefavoriteChinese3dish.Chinaisaplace4thefoodisnotonlydeliciousbutthe5cheapI'veeverfound.6mylastnightinBeijingbeforereturningtotheStatesIwenttoaPekingDuckrestaurantthathadbeensuggestformetotry.WhataBeautifulplace!Splendidwoodblockprintsonthewallsfreshflowersinthevasesonthetableattractivesilverwareandbeautifulchopsticks.Iwashanded7menuand8findmostofthepriceswereespeciallycheapforthehighqualityofthefood.Theduckcameinwholeorhalfalongwithallthelittledecorationsthatyouknowifyou'veevereatenPekingduck﹣alittletortilla玉米饼toputtheslicedduckandvegetablesinchoppedonionsauce.AnywayIendedup9orderawholeduckandthoughtI'djusttaketherestbacktomyhoteltoeatlaterifIcouldn'tfinishit.Unbelievablyintheendtherewas10ofthewholeduckleftontheplate.Ummyummy!
15分Onedayawolfhadabone1stickinhisthroatunexpectedlyand2suffergreatestpain.Heran3anddownaskingeveryanimalhemettoremovethebonefromhimatthesametime4suggestarewardtothesuccessfuloperator.Acrane鹤movedby5promiseventuredherlongneckdownthewolf'sthroatanddrewoutthebone.Shethenaskedforthepromisedreward.Toherquestionthewolfshowinghisteethwith6uglysmilerepliedUngratefulcreature!Youputyourheadintoawolf'smouthandtookitoutin7safe.8dareyouaskformorerewardthanthis Those9areonlyinthehopeofareturnmustnotbesurprisedwhentheycomefacetofacewithbadmen.Whattheymeetwitharemorelaughs10thanks.
1.5分Thea气氛changedassoonasshewalkedin.
10分HaveyouconsideredhowyoucanplanaweekendgetawayonabudgetItisthegrowingtrendforhardworkingAmericanstotakeseveralweekendtripsoverthecourseofayearinsteadofonelargeweek﹣longvacation.Thereareavarietyofthingstoseetoanddowithoutspendingalongtimeoralotofmoneydoingit.Sohowcanyouafunandunforgettableweekendgetawaywithabudget1LeavingonThursdayswillallowmuchcheaperpricesonplaneticketshotelroomsrentalcarsandvacationpackages.Avoidtravelingonholidayweekends.PricesareraisedandthingsarebookedearlyandsoldoutonweekendsduringtheholidayssuchasMemorialDayNationalDayThanksgivingandLaborDay.2Considertravelinglastminute.Althoughitmaybehardtoplanespeciallyifchildrenareinvolvedmanyplacessuchashotelsandairlinesoffergreatdiscountedratesforlastminutebookings.3Findcheapthingstodo.Someofthesemayincludenationalorstateparksamusementparksstatefairsandcamping.Saveevenmoremoneybyfindingsomethingnearbywithindrivingdistanceinsteadofflying.Havearelaxingweekendbygettingmuchrest.Don'tcram塞满alotofthingstodointoaweekendtrip.Notonlywillthissavemoneybutitwillofferarefreshingpick﹣upandnotfindthetravelermoretiredafterthetripthanbefore.4Traveltoplacesduringdowntimes.DestinationssuchastheCaribbeanandskiresortsoffermanyfunactivitiesduringthesummerwhichisnotpeaktravelingtime.5A.Bewellpreparedbeforehand.B.Sodon'tplanaholidayweekend.C.Travelingabroadwillincreaseyourtravelcost.D.Travelinglastminutecansaveyousomemoney.E.Priceswillbemuchlowerduringthesetimes.F.StarttheweekendonThursdayinsteadofFridaytosavemoney.G.Spendtheweekendinthewoodsreadinganovelorbaskinginthesun.
7.5分Theanswertoprotectingandsavingmarine海洋wildlifecanstartwithcuttingbackonsomethingAmericansuseeveryday﹣plasticdrinkingstraws.ActorAdrienGrenierbestknownforplayingVincentChaseinthe2015movieEntouragelaunchedacampaigntoreducetheamountofsingle﹣useplasticusageinthiscountryinordertoprotectandsavemarinewildlifeandtheenvironment.Plasticdrinkingstrawsareamongmanymanysingle﹣useplasticproductscontributingtotheshockinglossofmarinelifebutthey'reagreatplacetostartbecausethey'resomethingAmericansareusingbythehundredsofmillionswithoutanyawarenessthatthey'resodamaging. AccordingtoEcocycleaninternationalenvironmentalorganizationAmericansusemorethan500millionstrawsdailywhichareenoughtofill127schoolbuseseachdayandtheycan'tberecycled.That meansplasticstrawsendupinlandfillsoroceanswherefishandothermarinewildlifemistakethesmallbitsforfoodandswallowthem.AfterseeingaphotoofawhalebeachedontheshorewithabellyfullofplasticGrenierfelttheinspirationtolaunchtheLonelyWhaleFoundationhopingtoinspireandeducateothersonthechallengesfacingmarinelife. AlongwithstoppingtheuseofstrawsGrenierhopestoeducateconsumersonthedangersofothersingle﹣useplasticitemssuchasgrocerybagsandwaterbottles.WhilemanyAmericansusetheseplasticproductsintheirdailylifetherearemoresustainablealternativesthatcanhelpprotecttheenvironmentEcocyclerecommendstheuseofstrawsmadefromstainlesssteelglassandevenbambooinsteadofplastic.Youcanbuyanumberoftheseenvironmentallyfriendlystrawsonlineandinstores. 1WhatistheprimarypurposeoftheLonelyWhaleFoundation A.Toadvocateagreenlifestyle. B.TopromoteGrenierslatestmovie. C.Toencouragepeopletoprotectoceanlife. D.Tosavepreciousnaturalresources. 2WhatcausedGreniertostarttheLonelyWhaleFoundation A.Apictureofadeadwhale. B.Plasticstrawsinlandfills. C.Theseveredamagedonetothesea. D.Thedisappearanceofsomespeciesunderthesea. 3Ecocycleadvisespeopletousestrawsthatare. A.easytorecycle B.harmlesstotheenvironment C.specialtomarinelife D.convenienttouse
6分Myson.ThephrasefeltdifficultandstrangethefirsttimeIsaiditandIhadtopracticeitathousandtimes.Istartedsayingthewordstomyselfthedaywhentheultrasound超声波toldmewewerehavingababy. Finallymysonwasborn. Thenursecameoutofthedeliveryroomholdingatinyhowlinghumanbeingwrappedinawhitesheethissmallhandsanddelicatefingersshakingnervously. BabySanchezsheaskedlookingattheroomfullofexpectantfathers. Istoodupholdingmybreath. Sheshowedmemybaby.MysonIwhispered.Thelittleguyscreamedwaaaaaaaaaah. ButinmyheartIheardhimcryoutDaaaaaaad!Idon'tcareifeveryoneintheroomwillsaytheydidn'thearmybabysaythat.IcalledhimMysonandhecalledmeDadandthat'sthat. PeopleaskmeWhatdidIfeelatthatmomentIcan'tevenbegintoanswer.I'mawriteryetItryhardtofindtherightwords.Joyfulisn'tpowerfulenough.Bliss狂喜isnotsweetenough.Peacefulisn'tcalmenough.Happyisn'ttenseenough. AftermysonwastakenawaytothenurseryIsatdownandshutmyeyes.Buttearsescapedthemaway.Thensuddenlymy80﹣year﹣oldfatherenteredandweembraced拥抱. DadIwhispered. Mysonmyheartheardhimsaying. Suddenlythepast33yearsfoldedintothepresentandIwasnowthebabybundledinwhitewithmyfatherstandingoverme. MysonIimaginedhimsaying. Daaaaaaaaaad!Icriedmylittlelungsout. AtthatpointIknewIwasgoingtobeagreatfather.Theoldmaninfrontofmeseemedtoagree.Hesmiledandwewalkedoutoftheroominsearchofthelittlehumanbeingthatwouldchangeourlivesforever. 1Theauthorcouldn'ttellhowhefeltatthemomentbecause. A.hewasawriter B.hewastooexcited C.hewastoonervous D.it'safeelingtoohardtoexpress 2WecanlearnthefollowingfromthepassageEXCEPTthat. A.theauthorgothisfirstbaby B.heprobablyhadalungdisease C.theauthordidn'treallyhearDaaaaadfromhisbaby D.thebabywouldchangetheauthor'slife 3Whywasthewritersurehewasgoingtobeagreatfather A.Becausehissonissogifted. B.Becausehehadmuchexperienceinbringingupchildren. C.Becausehisfatherpromisedtohelphim. D.Becausehisfatherhadalreadysethimagoodexample.
30分IwasshoppinginasupermarketlastnightwhenIsawahomelesswomanwithatrolley手推车fullofallherthings.Shewassittinginsidetokeep1.Iwentuptoherandtriedtogiveher2forsomethingtoeat.Shewouldn't3it.IsaidIwantedtohelpher4shesaidthatifenoughmoneywasgiventoherthatdayandshehadmoneyonherotherhomelesspeoplewould5itfromherwhilesheslept. I6thatIwantedtohelpherandaskedifIcouldbuyhersomethingwarm.7shesaidno.Shethankedmeandsaidhow8shewasthatIhadspokentoherandoffered9.WeintroducedourselvesandshesaidthatwhenIsawherthenexttimeshewould10accepthelp. Iwalkedoutintothecoldwinter11andgavethemoneytoahomelessmanwhowasfreezing.Iaskedhimhisname12IalwayswanttoknowandItoldhimmine.HappearedtohavehadadrinkingordrugproblembutIwas13thatheacceptedmyhelp. Ihadthis14thatstayedwithme.IfeltthatIhadbeeninthepresenceofsomeonereallyspecialearlier.Ialways15whatitwouldbeliketobeinahomelessperson'sshoesIknowhow16IamandhowgratefulIamforwhatI17inmylife. Ilearnedavaluable18fromtheladyImet:Notall19peoplewilltakemoneyorhelpiftheyfeelenoughhasbeengiventothemthatday.Shewasgratefulfortheday.IwillmakesureI20heragain. 1Acalm B.warm C.healthy D.energetic 2A.time B.freedom C.money D.choice 3A.take B.make C.eat D.receive 4A.and B.or C.so D.but 5A.spend B.steal C.find D.hide 6A.agreed B.wondered C.apologized D.explained 7A.Again B.Besides C.Instead D.Thus 8A.proud B.curious C.regretful D.grateful 9A.help B.food C.strength D.advice 10A.generously B.willingly C.slightly D.politely 11A.morning B.noon C.afternoon D.night 12A.unless B.when C.because D.though 13A.glad B.sure C.astonished D.puzzled 14A.hope B.feeling C.belief D.courage 15A.expect B.believe C.imagine D.remember 16A.lucky B.unique C.serious D.confident 17A.observe B.own C.support D.respect 18A.fact B.quality C.lesson D.subject 19A.lonely B.hungry C.helpless D.homeless 20A.call B.ask C.meet D.follow
热门题库
更多
高三上学期物理
高三上学期生物
高三上学期化学
高二下学期化学
高二下学期生物
高三下学期生物
高三下学期化学
高三上学期英语
高二下学期英语
教案备课库
高三下学期英语
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
CCl4
CCl4
ClO
NO
ClO
为正四面体形 PCl3为平面三角形
湘公网安备 43130202000226号