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:
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:
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>
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>}
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
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
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=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))
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><sub>A</sub></b><b>和</b><b>R</b><b><sub>B</sub></b><b>．设卫星对应的角动量分别是</b><b>L</b><b><sub>A</sub></b><b>、</b><b>L</b><b><sub>B</sub></b><b>，动能分别是</b><b>E</b><b><sub>KA</sub></b><b>、</b><b>E</b><b><sub>KB</sub></b><b>，则应有</b><b> </b><b> </b><b> [ </b><b> </b><b> ]</b><b><o:p></o:p></b> </p> <p class="MsoNormal"> <b><br> </b> </p>
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><sub>A</sub></b><b>和</b><b>R</b><b><sub>B</sub></b><b>．设卫星对应的角动量分别是</b><b>L</b><b><sub>A</sub></b><b>、</b><b>L</b><b><sub>B</sub></b><b>，动能分别是</b><b>E</b><b><sub>KA</sub></b><b>、</b><b>E</b><b><sub>KB</sub></b><b>，则应有</b><b> </b><b> </b><b> [ </b><b> </b><b> ]</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)。
设A=ía,bý,B=í1,2,3ý,求:A×B,B×A,A×A,B×B和(A×B)∩( B×A)。