简述四种血浆脂蛋白的来源及功能。
(1)乳糜微粒(CM)，由小肠粘膜细胞生成，运输食物中消化吸收的外源性甘油三酯及胆固醇等至全身组织被利用。
(2)极低密度脂蛋白(VLDL)，主要由肝细胞生成，转运内源性甘油三酯和胆固醇到肝外被利用。
(3)低密度脂蛋白(LDL)，在血中由VLDL转变生成，转运肝中胆固醇到全身各组织被利用。
(4)高密度脂蛋白(HDL)，由肝细胞及小肠细胞生成，清除血液中“多余”的胆固醇逆向转运回肝脏，有降低血浆胆固醇浓度的作用。
暂无解析
Doyouknowthereason____hewaslate?
TroublewithTeamwork
MaryOwenexaminestheroleandefficiencyofteams
Recruiterssaythatcandidateswhocangiveexamplesofworktheyhavedoneasmembersofasuccessfulteamareinasstrongapositionasthosewhocanpointtosignificantindividualachievement.Indeed,toomuchofthelattermaysuggestthatthepersonconcernedisnota'teamplayer'-oneofthemoreseriousfailingsinthebookofmanagement.
Theimportanceofbeingateamplayerisasideeffectoftheincreasinginteractionacrossdepartmentsandfunctionaldivides.Insteadofpushingreports,paperworkanddecisionsaroundtheorganisation,'teamsprovideadynamicmeetingplacewhereideascanbesharedandexpertisemorecarefullytargetedatimportantbusinessissues,'saysSteveGardner,inhisbookKeyManagementConcepts.Headds,'Globalisationhasaddedafurtherdimensiontoteamwork.Multinationalteamsnowstudypolicydecisionsinthelightoftheirimpactonthelocalmarket.'
Butisteamworkingbeingoverdone?'Somemanagersareonasmanyassevenoreightdifferentteams',saysDrCathyBandy,apsychologistwhorecentlyranaconferenceonthesubject.'Theytakeupsomuchtimethatmanagerscan'tgetonwithcoretasks.'Formingteamsandhavingmeetingshas,shesays,becomeanendinitself,almostregardlessofpurpose.Thereisalsothedangerofanunhealthydesiretokeeptheteamgoingaftertheworkhasbeendone.'Peoplefeeltheneedtobelong,andteammembershipcanprovideakindofpsychologicalsupport.'
Theideabehindteamworkingisthat,whentherightgroupofpeopleisbroughttogether,a'force'developswhichisgreaterthanthesumoftheirindividualtalents.Thisisoftentrueinsport,wheregoodplayerscanreachunexpectedheightsasmembersofaninternationalteam.However,fewbusinesssituationshaveasclearasetofobjectives,orasclearcriteriaofsuccessorfailure,aswinningamatch.
'Inbusiness,everyoneneedstobeclearaboutwhatthechallengeisandwhetherateamistherightwayofapproachingit',saysSteveGardner.'Unfortunately,peoplefocusinsteadonwhothemembersoftheteamshouldbeandwhatrolestheyaretoplay'DrBandyagrees.'Thereisalwaysadangerthatteamscanturnintocommittees,'shesays.'Inalotofsituations,oneortwoindividualswouldbemuchmoreeffective.'
Sowhatmakesasuccessfulteam?Therearesomegeneralqualitiesthathavebeenidentified.SteveGardnerrecommendsthatineveryteamthereshouldbesomeonewhoisgoodatresearchingideasandanotherwhoisgoodatshootingdownimpracticalones.Thereshouldbethosewhocanresolvethetensionsthatnaturallyoccurinateamandotherswhoarefocusedongettingthejobdone.Also,providingaclearandachievabletargetattheoutsetisthebestwayofensuringthattheteamwillmoveontogreaterthings.
13、Whatpointdoesthewritermakeaboutteamworkingatthebeginningofthearticle?
AItisthemostsuccessfulformofmanagement.
BIthaschangedtherecruitmentprocedureincompanies.
CWell-runteamsstillallowindividualstodemonstratetheirtalents.
DBeingateamplayerisnowconsideredanessentialmanagementskill.
14、Accordingtothearticle,teamworkdevelopedwithincompaniesasaresponseto
Amodernofficedesign.
Bchangingworkpractices.
Careductioninadministrativetasks.
Dtheexpansionofinternationalbusiness.
15、Inthethirdparagraph,DrBandysuggeststhat
Amanyemployeesdonotenjoyworkinginteams.
Bsomemanagersarenotveryeffectiveteamleaders.
Csometeamsarecreatedunnecessarily.
Dfewteamsarewellorganised.
16、Accordingtothewriter,teamworkismoreeffectiveinthefieldofsportbecausetheplayers
Aknowwhattheywanttoachieve.
Baremorecompetitivebynature.
Chavemoreindividualtalent.
Dcanbedrivenbynationalpride.
17、SteveGardnerandDrBandyagreethatwhenabusinessteamiscreatedpeopledonotpayenoughattentionto
Athestructureoftheteam.
Balternativestotheteam.
Cselectingtheteammembers.
Ddirectingtheteam'sactivities.
18、WhatisSteveGardner'sadviceonoperatingasuccessfulteam?
AMaintainaflexibleapproachtomembership.
BAllowpersonalitiestodevelopwithintheteam.
CSelectpeoplewhofitnaturallyintocertainroles.
DMakeeveryefforttoavoidconflictbetweenmembers.
---Wouldyouliketogooutforawalkwithus?
---_____,butImustfinishmyhomeworkfirst.
Tammy:Someoneisatthedoctor.
Richard:______.
ProjectHopeisanorganization_____raisesmoneytobuildschoolsandbuybooksforpoorchildren.
