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:

【单选题】NO 2 、NO 2 - 、NO 2 + 键角大小关系正确的是 。 A. NO 2 > NO 2 - >NO 2 + B. NO 2 + >NO 2 >NO 2 - C. NO 2 - > NO 2 >NO 2 + D. NO 2 + > NO 2 - >NO 2

求定积分[img=179x43]17da65388c0b1ca.png[/img]； （ ） A: log(2^(1/2) + 1)/2 + 2^(1/2)/2 B: log(2^(1/2) + 1)/2 - 2^(1/2)/2 - 1/2 C: log(2^(1/2) + 1)/2 + 2^(1/2)/2 - 1/2 D: log(2^(1/2) + 1)/2 + 2^(1/2)/2 + 1/2

2 + 2 * (2 * 2 - 2) % 2 / 3

函数z=xsiny在点(1,π/4)处的两个偏导数分别为 A: √2/2,√2/2 B: √2/2,-√2/2 C: -√2/2,-√2/2 D: -√2/2,√2/2

2×2×2×2×2

HbF的构成主要是（） A: α2β2 B: α2δ2 C: ζ2ε2 D: α2γ2 E: ζ2γ2

胎儿期血红蛋白HbF的分子组成为（ ）。 A: ζ2ε2 B: α2Aγ2、α2Gγ2 C: ζ2 Aγ2、ζ2Gγ2 D: ζ2 Aγ2、 E: α2δ2 、α2β2

正常人血红蛋白多肽链的组成是 A: α2β2 B: α2γ2 C: α2ε2 D: α2δ2 E: σ2β2

函数[img=79x27]180355ae2690a03.png[/img]在x=2处的二阶泰勒展开式为 A: exp(sin(2))+cos(2)*exp(sin(2))*(x-2)+exp(sin(2))*(sin(2)/2-cos(2)^2/2)*(x-2)^2 B: exp(sin(2))+cos(2)*exp(sin(2))*(x-2)-exp(sin(2))*(sin(2)/2-cos(2)^2/2)*(x-2)^2 C: exp(sin(2))+cos(2)*exp(sin(2))*(x-2)-exp(sin(2))*(sin(2)/2+cos(2)^2/2)*(x-2)^2 D: exp(sin(2))+cos(2)*exp(sin(2))*(x-2)+exp(sin(2))*(sin(2)/2+cos(2)^2/2)*(x-2)^2