HolidayBluesA.Theholidayseasonhasalwaysbeenacauseforcelebrationaroundtheworld.Theopportunitytotakeabreakfromwork,befrivolous,goonholiday,meetfamilyandfriends---allgoodreasonstolookforwardtotheholidayswithenthusiasmandanticipation.Oratleastthatiswhatweareledtobelieve.B.ResearchcarriedoutinAmericasuggeststhatthesefeelingsofeuphoriamaybesomewhatmisplaced.AstudyrecentlycarriedoutbyNewYorkUniversityChildStudyCentrehasconcludedthatoneinthreepeopleofvaryingagessuffer‘holidayblues’tovaryingextents,fromamildfeelingofsadnesstosevere,sometimesevensuicidal,depression.Theeffectscanmanifestthemselvesinmanyways,suchasaninabilitytosleeporsleepingtoomuch,overeatingorundereating,headachesordrinkingtoomuch.Thereportalsoconcludedthatnotonlyarethereanumberofcomplexcausesthatcantriggersuchdepression(psychologicalandbiological),thereareanequalnumberofopinionsastothebestsolution.C.AccordingtoDrFrankPittman,aleadingfamilypsychiatrist,themostsignificantcauseforholidaydepressionactuallystemsfromourconcernsaboutourfamily.Duringtheholidayseason,familiesmeet,oftenforthefirsttimesincethelastholidayseason,andtrytomakethesereunions‘perfect’.Infact,saysPittman,wecountontheholidaystocompensatefortherestoftheyear.Hehimselfcommentsthat‘Iwantedtomakeuptothefamilyfornothavingbeenagoodenoughfatheranduncleallyear’.However,suchgoodintentionsareoftenthwartedbyoldfamilyarguments,feelingsofnotbeingappreciatedorbeingused,allofwhichresultinholidaystress.Itseemsthattheidyllicpictureofourfamilywewishtobuildinourmindscannotbesustainedinreality.D.AlthoughPittmanholdsfamilytobethesourceofmuchoftheproblem,otherspointtoamoregeneralsocialcontext.Giftshopping,forexample,doesnothelpreducetensions---crowdedshops,longqueues,thepressureofchoosingjusttherightpresent---allofthesethingscontributetoafeelingofstressandanxiety.Ontheotherendofthescale,therearethosewithoutfamilywhoexperienceasenseofextremelonelinessandisolationthroughoutthisperiod,oftenspendingthelongholidaysalone.Anyfeelingsofinadequacytheymayharbourthroughouttheyearcanoftenbecomeunbearableatatimewhenfriendsareunavailableandenjoyinganapparentlycosybreakwiththeirlovedones.Infact,suchistheextremenatureofthisisolationthatmanyorganisationshavebeenestablishedtooffersomehelpandsupporttothosewhofeelmostaloneoverwhatshouldbethe‘festive’season.E.Others,however,arguethatmorescientificexplanationscarryanequalweightinexplainingholidayblues.SeasonalAffectiveDisorder,orSADasitismorecommonlyknown,isalsoheldresponsibleforwinterdepression.Anaturalreactiontofallinglevelsofsunlight,thepinealglandsecretesthehormonemelatonin,whichhastheeffectofslowingthebodydown.Whendaysgetshorter,moreofthehormoneisreleasedcausingsuffererstobecomelethargicandmiserable.Frombeingindustriouspeoplewithplentyofenergy,SADsufferersfindthemselvesincreasinglywearyandunabletosustainanyprolongedactivity,asituationwhichoftenleadstodepression.Inaddition,formanypeoplethishasamajorimpactnotonlyontheirpersonallifebutalsoontheirprofessionallife,asemployersoftenseethislackofproductivityintermsoflazinessorunwillingnesstowork.Asaresult,SADhasbeenlinkeddirectlytothehighrateofsuicideinanumberofScandinaviancountriesduringwintermonths,whenthereareoftenafewhoursofsunlightaday.F.ThegoodnewsforSADsufferersisthatthereisacure,andasfarasmanymedicalcuresgothisisrelativelysimple.Asthecauseislackofbrightlight,thetreatmentistobeinbrightlighteveryday.Thiscanobviouslybeachievedbystayinginabrightlylitclimate,explainingwhyskiingholidaysaresopopularastheyallowpeopletogetplentyofsunlightaswellasprovidingastimulatingactivity.Anothermethodisbyusinglighttherapy,inwhichpatientssitinfrontofalampwhichactsinthesamewayassunlight.Tobemorespecific,thelightshouldbeaboutasbrightasearlymorningsunshine,andtheusershouldallowthelighttoreachtheeyesforanythinguptoonehouradayinordertoalleviatethesymptoms.Thereareanumberofcompaniescurrentlymanufacturingtheselightsasahealthaidandtheyareevenbeingprescribedbysomedoctors.Inaddition,theycanbeboughtatconsiderablylessthanthecostofaholiday.G.Whateverfundamentalreasonunderpinsholidaydepression,itseemsreasonabletoarguethatthephenomenondoesindeedexist.Voluntarysupportservices,offeringcounselingservicestothosewhoneedtheunbiasedandfriendlyvoiceofastrangertohelpthemworkthroughtheirunhappinessreportasignificantincreaseddemandfortheirservicesduringholidayperiodssuchasChristmasandtheNewYear.Questions1–2CirclethecorrectanswerA–C1.Researchhasshownthat__________________.A.webecomemoredepressedduringtheholidaysB.poordietcanleadtodepressionC.simplethingscanleadustofeelvaryingdegreesofdepression.2.DrPittmanbelievesholidaydepressioncomesfrom_____________.A.feelingsofinadequacyB.beingaloneC.over-compensation.Questions3–6AREDELETED.Questions7–11ChoosethemostsuitableheadingsforsectionsB–Ffromthelistbelow.Useeachheadingonceonly.I.FamilycuresII.AddressingtheproblemIII.ImpactofpersonalityIV.PsychologicalfactorsV.BiologicalfactorsVI.AvoidingstressVII.ManifestationsofdepressionVIII.DepressioninchildrenIX.PressuresoftheholidayperiodParagraphB:ParagraphC:ParagraphD:ParagraphE:ParagraphF:

比较C≡C, C=C, C─C, C=C─C=C的键长次序为: C=C─C=C>C─C> C≡C >C=C|C=C─C=C>C─C>C=C>C≡C|C≡C>C=C>C─C>C=C─C=C|C─C>C=C>C=C─C=C>C≡C|C─C>C=C─C=C>C=C>C≡C

下列哪种主链骨架原子排列最能代表两个肽键?() A: Cα—N—Cα—C—Cα—N—Cα—C B: Cα—N—C—C—N—Cα C: C—N—Cα—Cα—C—N D: Cα—C—N—Cα—C—N E: Cα—Cα—C—N—Cα—Cα—C

比较C≡C(Ⅰ),C=C(Ⅱ),C─C(Ⅲ),C=C─C=C(Ⅳ)的键长次序为( )。 A: Ⅰ＞Ⅱ＞Ⅲ＞Ⅳ B: Ⅲ＞Ⅱ＞Ⅳ＞Ⅰ C: Ⅲ＞Ⅳ＞Ⅱ＞Ⅰ D: Ⅳ＞Ⅲ＞Ⅱ＞Ⅰ

不稳定的一类化合物是: C≡C|C－C|C＝C|C＝C－C＝C|C＝C＝C

NaNH4HPO4水溶液的质子条件式为 A: c(H+)+c(H2PO4-)+2 c(H3PO4)=c(OH-)+c(NH3) +c(PO43-) B: c(H+)+c(H2PO4-)+ c(H3PO4)=c(OH-)+c(NH3) +c(PO43-) C: c(H+)+c(NH3)+ c(H3PO4)=c(OH-)+c(PO43-) +c(H2PO4-) D: c(H+)+c(NH3)+ 2c(H3PO4)=c(OH-)+c(PO43-) +c(H2PO4-)

比较C≡C(I)，C=C(II)，C─C(III)，C=C─C=C(IV)的键长次序为：

在同一种固体介质中，纵波、横波、表面波三者之间的声速关系为（） A: C﹤C﹤C B: C﹤C﹤C C: C﹤C﹤C D: C﹤C﹤C

scanf(“%c%c%c“, &a,&b,&c)与scanf(“%c %c %c“ ,&a,&b,&c)的输入（ ）。

能产生共轭效应的是 A: C=C=C B: C=C C: C≡C D: C=C-C=C E: C-C