Exercise15 Questions1to5arebasedonthefollowingpassage: Whenyoucloseyoureyesandtrytothinkoftheshapeofyourownbody,whatyouimage(orrather,whatyoufeel)isquitedifferentfromwhatyouseewhenyouopenyoureyesandlookinthemirror.Theimageyoufeelismuchvaguerthantheoneyousee.Andifyouliestill,itisquitehardtoimagineyourselfashavinganyparticularsizeorshape. Whenyoumove,whenfeeltheweightofyourarmsandlegsandthenaturalresistanceoftheobjectsaroundyou,the“felt”imageofyourselfstartstobecomeclearer.Italmostasifitwerecreatedbyyourownactionsandthefeelingtheycause. Theimageyoucreateforyourselfhasratherstrangeproportions:certainpartsfeelmuchlargerthantheylook.Ifyougetaholeinoneofyourteeth,itfeelsenormous;youareoftensurprisedbyhowsmallitlookswhenyouinspectitinthemirror. Butalthoughthe“felt”imagemaynothavetheshapeyouseeinthemirror,itismuchmoreimportant.Itistheimagethroughwhichyourecognizeyourphysicalexistenceintheworld.Inspiteofitsproportions,itisallonepiece,andsinceithasaconsistencerightandleftandtopandbottom,itallowsyoutolocatenewfeelingswhentheyoccur.Itallowsyoutofindyournoseinthedarkandpointtoapain. Ifthefeltimageisdamagedforanyreason---ifitiscutinhalforlostitoftenisaftercertainstrokeswhichwipeoutrecognitionofoneentireside---thesetasksbecomealmostimpossible.Whatismore,itbecomeshardtomakesenseofone’sownvisualappearance.Ifonehalfofthe“felt”imageiswipeoutorinjured,thepatientstopsrecognizingtheaffectedpartofhisbody.Itishardforhimtofindthelocationoffeelingsonethatside,and,althoughhefeelsthedoctor’stouch,helocatesitasbeingontheundamagedside. 1.Inwhichofthefollowingsituationwillyoufindyourimagemostvague? A.Whenlookingintothemirror. B.Whenlyinginbedwithclosedeyes. C.Whenstanding. D.Whenwalking. 2.Whenyouconcentrateontheimageofacertainpartofyourbody,thepartwilllook______toyou. A.smallerandusual B.smallerthananyotherpartofthebody C.largerthanitreallyis D.largerthananyotherpartofthebody 3.Whyisthefeltimageimportant? A.Becauseitislargerthanthepartofthebody. B.Becauseitissmallerthanthepartofthebody. C.Becauseitreplacesallotherfeelings. D.Becauseitprovidesausefulframeworkforyourfeelings. 4.Theunderlined“thesetasks”inthelastparagraphdoesNOTmean______. A.locatingnewfeelings B.cuttingtheimageinhalf C.recognizingone’sphysicalexistenceintheworld D.pointingtoyournoseinthedark 5.Whichofthefollowingcanbethebesttitleofthepassage? A.One’sRealImageandFeltImage. B.One’sFeltImageIsNotReal. C.TheAdvantagesandDisadvantagesofOne’sFeltImage. D.TheFunctionsofOne’sFeltImage. PassageTwo Questions6to10arebasedonthefollowingpassage: AboutsixyearsagoIwaseatinglunchinarestaurantinNewYorkCitywhenawomanandayoungboysatdownatthenexttable,Icouldn’thelpoverhearingpartsoftheirconversation.Atonepointthewomanasked:”So,howhaveyoubeen?”Andtheboy-whocouldnothavebeenmorethansevenoreightyearsold-replied:“Frankly,I’vebeenfeelingalittledepressedlately.” Thisincidentstuckinmymindbecauseitconfirmedmygrowingbeliefthatchildrenarechanging.AsfarasIcanremember,myfriendsandIdidn’tfindoutwewere“depressed”untilwewereinhighschool. Theevidenceofachangeinchildrenhasincreasedsteadilyinrecentyears.Childrendon’tseemchildlikeanymore.Childrenspeakmorelikeadults,dressmorelikeadultsandbehavemorelikeadultsthantheyusedto. Whetherthisisgoodorbadisdifficulttosay,butitcertainlyisdifferent.Childhoodasitoncewasnolongerexists.Why? Humandevelopmentisbasednotonlyoninnate(天生的)biologicalstates,butalsoonpatternsofaccesstosocialknowledge.Movementfromonesocialroletoanotherusuallyinvolveslearningthesecretsofthenewstatus.Childrenhavealwaysbeentaughtadultsecrets,butslowlyandinstages:traditionally,wetellsixthgradersthingswekeephiddenfromfifthgraders. Inthelast30years,however,asecret-revelationmachinehasbeeninstalledin98percentofAmericanhomes.Itiscalledtelevision.Televisionpassesinformation,andindiscriminately,toallviewersalike,childrenoradults.Unabletoresistthetemptation,manychildrenturntheirattentionfromprintedtextstothelesschallenging,morevividmovingpictures. Communicationthroughprint,asamatteroffact,allowsforagreatdealofcontroloverthesocialinformationtowhichchildrenhaveaccess.Readingandwritinginvolveacomplexcodeofsymbolsthatmustbememorizedandpracticed.Childrenmustreadsimplebooksbeforetheycanreadcomplexmaterials. 6.Accordingtotheauthor,feelingdepressedis___________. A.asuresignofapsychologicalprobleminachild B.somethinghardlytobeexpectedinayoungchild C.aninevitablephaseofchildren’smentaldevelopment D.amentalstatepresentinallhumans,includingchildren 7.Traditionally,achildissupposedtolearnabouttheadultworld__________. a)throughcontactwithsociety b)graduallyandunderguidance c)naturallyandbybiologicalinstinct d)throughexposuretosocialinformation 8.Thephenomenonthattoday’schildrenseemadult-likeisattributedbytheauthorto_______. A.thewidespreadinfluenceoftelevision B.thepoorarrangementofteachingcontent C.thefastpaceofhumanintellectualdevelopment D.theconstantlyrisingstandardofliving 9.Whyistheauthorinfavorofcommunicationthroughprintforchildren? A.Itenableschildrentogainmoresocialinformation. B.Itdevelopschildren’sinterestinreadingandwriting. C.Ithelpschildrentomemorizeandpracticemore. D.Itcancontrolwhatchildrenaretolearn. 10.Whatdoestheauthorthinkofthechangeintoday’schildren? A.Hefeelsamusedbytheirprematurebehavior. B.Hethinksitisaphenomenonworthyofnote. C.Heconsidersitapositivedevelopment. D.Heseemstobeupsetaboutit. PassageThree Questions11to15arebasedonthefollowingpassage: Itisnaturalforyoungpeopletobecriticaloftheirparentsattimesandtoblamethemformostofthemisunderstandingsbetweenthem.Theyhavealwayscomplained,moreorlessjustly,thattheirparentsareoutoftouchwithmodernways;thattheyarepossessiveanddominant;thattheydonottrusttheirchildrentodealwithcrises;thattheytalktoomuchaboutcertainproblems—andthattheyhavenosenseofhumor,atleastinparent-childrelationships. Ithinkitistruethatparentsoftenunderestimatetheirteenagechildrenandalsoforgethowtheythemselvesfeltwhenyoung. Youngpeopleoftenirritatetheirparentswiththeirchoicesinclothesandhairstyles,inentertainersandmusic.Thisisnottheirmotive.Theyfeelcutofffromtheadultworldintowhichtheyhavenotyetbeenaccepted.Sotheycreateacultureandsocietyoftheirown.Then,ifitturnsoutthattheirmusicorentertainmentsorvocabularyorclothesorhairstylesirritatetheirparents,thisgivesthemadditionalenjoyment.Theyfeeltheyaresuperior;atleastinasmallway,andthattheyareleadersinstyleandtaste. Sometimesyouareresistantandproud,becauseyoudonotwantyourparentstoapproveofwhatyoudo.Iftheydidapprove,itlooksasifyouarebetrayingyourownagegroup.Butinthatcase,youareassumingthatyouaretheunderdog:youcan’twinbutatleastyoucankeepyourhonor.Thisisapassivewayoflookingatthings.Itisnaturalenoughafterlongyearsofchildhood,whenyouwerecompletelyunderyourparents’control.Butitignoresthefactthatyouarenowbeginningtoberesponsibleforyourself. Ifyouplantocontrolyourlife,co-operationcanbepartofthatplan.Youcancharmothers,especiallyyourparents,intodoingthingsthewaysyouwant.Youcanimpressotherswithyoursenseofresponsibilityandinitiative,sothattheywillgiveyoutheauthoritytodowhatyouwanttodo. 11.Theauthorisprimarilyaddressing_____. A.parentsofteenagersB.thosewhogiveadvicetoteenagers C.newspaperreadersD.teenagers 12.Thefirstparagraphismainlyabout_____. A.theteenagers’criticismoftheirparents B.misunderstandingsbetweenteenagersandtheirparents C.thedominanceoftheparentsovertheirchildren D.theteenagers’abilitytodealwithcrises 13.Teenagerstendtohavestrangeclothesandhairstylesbecausethey_____. a)wanttoshowtheirexistencebycreatingacultureoftheirown b)haveastrongdesiretobeleadersinstyleandtaste c)havenootherwaytoenjoythemselvesbetter d)wanttoirritatetheirparents 14.Teenagersdonotwanttheirparentstoapproveofwhatevertheydobecausethey_____. a)havealreadybeenacceptedintotheadultworld b)feelthattheyaresuperiorinasmallwaytotheadults c)arenotlikelytowinovertheadults d)haveadesiretobeindependent 15.Toimproveparent-childrelationships,teenagersareadvisedtobe_____. A.obedientB.responsibleC.co-operativeD.independent

Whichtwowordsareclosestinmeaning?<br/><b>cycle</b><b>，</b><b>hawk</b><b>，</b><b>convey</b><b>，</b><b>extort</b><b>，</b><b>peddle</b><b>，</b><b>summon</b>

设A{a,b}，则P(A)×A = (   )。 A: A B: P（A） C: {<Φ,a>,<Φ,b>,<{a},a>,<{a},b>,<{b},a>,<{b},b>,<A,a>,<A,b>} D: {<a,,Φ,>,<b,,Φ,>,<a,{a}>,<b,{a}>,<a,{b}>,<b,{b}>,<a,A>,<b,A>}

以下哪段代码可以将A,B的值互换（） A: A=A^B; B=A^B;A=A^B B: A= A^B;A=A^B;B=A^B C: B= A^B; B=A^B; A=A^B D: B=A^B; A= A^B; A= A^B

若集合A={a，b}，B={ a，b，{ a，b }}，则（）。 A: A⊆B，且A∈B B: A∈B，且B⊆A C: A⊈B，且A∉B D: A∉B，且A⊈B

设论域D={a,b}，与公式[img=504x85]17d6234b6469e12.png[/img]等价的命题公式是（ ） A: (A（a）∧A（b）) → (B（a）∧B（b）) B: (A（a）→B（a）)∨(A（b）→B（b）) C: (A（a）∨A（b）) → (B（a）∨B（b）) D: (A（a）→B（a）)∧(A（b）→B（b）)

设论域D={a,b},与公式[img=126x21]17da63121bb0ede.png[/img]等价的命题公式是( ) A: (A(a)∧A(b)) → (B(a)∧B(b)) B: (A(a)→B(a))∨(A(b)→B(b)) C: (A(a)∨A(b)) → (B(a)∨B(b)) D: (A(a)→B(a))∧(A(b)→B(b))

优学院: <p class="MsoNormal"> <b>一人造地球卫星到地球中心</b><b>O</b><b>的最大距离和最小距离分别是</b><b>R</b><b>_A</b><b>和</b><b>R</b><b>_B</b><b>．设卫星对应的角动量分别是</b><b>L</b><b>_A</b><b>、</b><b>L</b><b>_B</b><b>，动能分别是</b><b>E</b><b>_KA</b><b>、</b><b>E</b><b>_KB</b><b>，则应有</b><b>&nbsp;</b><b>&nbsp;&nbsp;&nbsp;</b><b>&nbsp;[ &nbsp;</b><b>&nbsp;&nbsp;</b><b>&nbsp;]</b><b><o:p></o:p></b> </p> <p class="MsoNormal"> <b><br> </b> </p>

设个体域D={a，b}与公式∀x A(x)∧∀xB(x) 等价的命题公式是( ) A: (A(a)∧A(b)) ∧(B(a) ∧B(b)) B: (A(a)∨A(b)) ∧(B(a) ∨B(b)) C: (A(a)∧A(b))∨(B(a)∧B(b)) D: (A(a)∨B(a)) ∧(A(b) ∨B(b))

设A=ía,bý,B=í1,2,3ý,求:A×B,B×A,A×A,B×B和(A×B)∩( B×A)。