关于Diffie-Hellman算法描述正确的是()

A、它是一个安全的接入控制协议
B、它是一个安全的密钥分配协议
C、中间人看不到任何交换的信息
D、它是由第三方来保证安全的
查看答案
正确答案:

B

答案解析:

暂无解析

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翻译:

如今,中国正步入老龄化社会,因此独生子女一代面临着巨大的工作和生活压力。中国政府开始适当调整计划生育政策,允许一些家庭在特殊情况下生育二胎。但调查显示,很多夫妻迫于不断加重的经济压力,放弃生育二胎。因此,要从根本上解决老龄化的问题不能依靠出生率的上升,最有效的办法是建立有效的社会保障制度。

IfonlyI_____playtheguitaraswellasyou!

A、would
B、could
C、should
D、might

InwhatwaydoesLauraLenox-Conynghammakeherliving?

A、Bytakingphotographsformagazines
B、Bymarringarichman
C、Bysublettingtheloungesofa-bedtoherbrother
D、Bypreparingfoodforphotographsforsomemagazines

TEXTB

Whatweknowofprenataldevelopmentmakesallthisattemptmadebyamothertomoldthecharacterofherunbornchildbystudyingpoetry,art,ormathematicsduringpregnancyseemutterlyimpossible.Howcould

suchextremelycomplexinfluencespassfromthemothertothechild?Thereisnoconnectionbetweentheirnervoussystems.Eventhebloodvesselsofmotherandchilddonotjoindirectly.Anemotionalshocktothemotherwillaffectherchild,becauseitchangestheactivityofherglandsandsothechemistryherblood.Anychemicalchangeinthemother'sbloodwillaffectthechildforbetterorworse.Butwecannotseehowalooking

formathematicsorpoeticgeniuscanbedissolvedinbloodandproduceasimilarlikingorgeniusinthechild.

Inourdiscussionofinstinctswesawthattherewasreasontobelievethatwhateverweinheritmustbeof

someverysimplesortratherthananycomplicatedorverydefinitekindofbehavior.Itiscertainthatnoone

inheritsaknowledgeofmathematics.Itmaybe,however,thatchildreninheritmoreorlessofarathergeneral

abilitythatwemaycallintelligence.Ifveryintelligentchildrenbecomedeeplyinterestedinmathematics,they

willprobablymakeasuccessofthatstudy.

Asformusicalability,itmaybethatwhatisinheritedisanespeciallysensitiveear,apeculiarstructureofthe

handsorthevocalorgansconnectionsbetweennervesandmusclesthatmakeitcomparativelyeasytolearnthe

movementsamusicianmustexecute,andparticularlyvigorousemotions.Ifthesefactorsareallorganized

aroundmusic,thechildmaybecomeamusician.Thesamefactors,inothercircumstancemightbeorganized

aboutsomeothercenterofinterest.Therichemotionalequipmentmightfindexpressioninpoetry.Thecapable

fingersmightdevelopskillinsurgery.Itisnottheknowledgeofmusicthatisinherited,thennoreventheloveof

it,butacertainbodilystructurethatmakesitcomparativelyeasytoacquiremusicalknowledgeandskill.

Whetherthatabilityshallbedirectedtowardmusicorsomeotherundertakingmaybedecidedentirelybyforces

intheenvironmentinwhichachildgrowsup.

6.Whichofthefollowingstatementsisnottrue?

A.Somemotherstrytoinfluencetheirunbornchildrenbystudyingartandothersubjectsduringtheir

pregnancy.

B.Itisutterlyimpossibleforustolearnanythingaboutprenataldevelopment.

C.Thebloodvesselsofmotherandchilddonotjoindirectly.

D.Therearenoconnectionbetweenmother'snervoussystemsandherunbornchild's.

7.Amotherwillaffectherunbornbabyontheconditionthat____.

A.sheisemotionallyshocked

B.shehasagoodknowledgeofinheritance

C.shetakespartinallkindofactivities

D.shestickstostudying

8.Accordingtothepassage,achildmayinherit____.

A.everythingfromhismotherB.aknowledgeofmathematics

C.arathergeneralabilitythatwecallintelligence

D.hermother'smusicalability

9.Ifachildinheritssomethingfromhismother,suchasanespeciallysensitiveear,apeculiarstructureofthe

handsorofthevocalorgans,hewill____.

A.surelybecomemusician

B.mostlybecomeapoet

C.possiblybecomeateacher

D.becomeamusicianontheconditionthatallthesefactorsareorganizedaroundmusic

10.Whichofthefollowingisthebesttitleforthepassage?

A.RoleofInheritance.

B.AnUnbornChild.

C.Functionofinstincts.

D.InheritedTalents.

PartIIICloze

Directions:Therearetwentyblanksinthefollowingpassage.Foreachblanktherearefourchoices.ChoosetheonethatbestfitsintothepassageandthenmarksyouranswerontheAnswerSheet.

In1982,MarkThatcher,thesonofMrs.Thatcherwasreported61intheSaharaDesertwhilecompetingintheGrandPrixmotorracefromParistoDakar.Thissadnews,so62,shooktheusuallycalmandunperturbedseasonedpolitician63herbalance.Thoughshedidherbesttopretendasif64hadhappenedandmadeherpublicappearancesasusual,peoplecouldnot65tonoticethatshewasnolongertheold66primeministerwhoalwayshadeverything67control.68shehadbecomeaverysadmotherwhowasunabletorecoverfromhershock.

Oneday,whenshewastospeakataluncheonparty,areportercaughther69herguardby70upthesubjectofhermissingsonagain.Shewastotallymentally71forthequestionandlostherselfcontrol.Tearswererollingdownhereyesasshesobbinglytoldthereporterthatthere72stillnonewsofMarkandthatshewasveryworriedabouthim.Shesaidthatallthecountries73hadpromisedtodotheirbesttohelpherfindherson.74thatshebrokedowncompletelyandsobbedsilentlyforquiteawhile.Graduallyshe75downandstartedtospeakas76.itwasaverymovingscenewhich77anewsideofMrs.Thatcher’scharacterthepublicdonotusuallysee,78peoplebegantotalkabouttheIronWoman’smaternallove,asentimentthatis79toallhumankind.

LaterMarkreturned80andsoundtohismother’sside,good-humoredandallsmilesasusual,asifnothingunusualhadeverhappened.TheIronWoman,however,brokedownagainaswassobbingforthesecondtime.

61.A.missingB.missedC.wantingD.wanted

62.A.expectedB.expectingC.unexpectedD.unexpecting

63.A.withB.onC.outD.off

64.A.somethingB.anythingC.nothingD.everything

65.A.missB.failC.pretendD.expect

66.A.reassuredB.self-assuredC.assuringD.self-assuring

67.A.forB.beneathC.belowD.under

68.A.InsteadB.howeverC.ThereforeD.So

69.A.intoB.outofC.onD.off

70.A.puttingB.bringingC.takingD.giving

71.A.readyB.preparedC.unpreparedD.unexpected

72.A.wasB.wereC.shouldbeD.wouldbe

73.A.concerningB.concernedC.worryingD.worried

74.A.AtB.BeforeC.AfterD.With

75.A.satB.brokeC.calmedD.became

76.A.plannedB.planningC.plansD.aplan

77.A.explainedB.exposedC.excludedD.exclaimed

78.A.howeverB.insteadC.soD.but

79.A.universalB.uniqueC.singleD.strange

80.A.safeB.safelyC.sightD.hearing

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