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简介：Chinawillfaceareboundofgeneticallytransmitteddiseasesinnewbornsinthreetofiveyearsifthetrendofrapidlydecliningpre-maritalphysicalexaminationsisnotreversed,accordingtoGuXiulian,ViceChairmanoftheStandingCommitteeoftheNationalPeople'sCongress.

简介：Adaptix是软件定义的OFDMA无线移动宽带接入技术的提供商，是NY3G合作伙伴，在纽约市拥有宽带无线业务（BRS）频率许可证，该公司宣布进行宽带固定和移动OFDMA／TDD的Pie-WiMAX系统的试验。

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简介：目的探讨乙型肝炎病毒pre—S1Ag、pre—S2Ag、HBV—DNA、HBV—M的相关性及其临床意义。方法HBV—DNA采用荧光定量PCR法；HBV—M及pre—S1Ag、pre—S2Ag采用ELISA法，检测96例HBV—DNA阳性感染者血清中pre-S1Ag、pre—S2Ag、HBV—M，同时以30例HBV—M全阴性的健康体检者血清作为对照，并对结果进行统计学分析。结果96例HBV—DNA阳性患者中HBsAg、HBeAg、HBcAb阳性检出率为64．6％；HBsAg、HBeAb、HBcAb阳性检出率为20．8％；HBsAg、HBcAb阳性栓出率为14．6％；pre—S1Ag在96例HBV—DNA阳性标本中检出率为70．8％；pre—S2Ag检出率为79．2％；均明显高于HBeAg的阳性率64．6％，30例对照中未检测出pre—S1Ag、pre—S2Ag及HBV—DNA。结论HBeAg、HBV—DNA、pre—S1Ag、pre—S2Ag之间具有一定的关联性。pre—S1Ag和pre—S2Ag均较HBeAg敏感。pre—S1Ag与pre—S2Ag的栓出率差异无显著性，ELISA检测HBV—M、pre—S2Ag及pre—S1Ag只是表型指标，只能提供HBV感染的间接证据。而HBV—DNA的检测是HBV感染与否的直接证据。HBV—M、pre—S1Ag、pre—S2Ag、HBV—DNA的检测各自有其独特的临床意义。应用pre—S1Ag、pre—S2Ag、HBV—DNA及HBV—M进行联合检测，对HBV感染的早期诊断，了解HBV复制、转归及监测疗效和预后有重要的意义。

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简介：Abstract:Languageteachersarefrequentlyconfrontedwithmultiplerolestheyhavetoplayinteachingwritingonundergraduatelevel:beinganadviser,aninstructor,asupervisor,areaderandagrader.Itisoftenhardforateachertoswitchfromoneroletoanotherandprovidestudentswithpracticable,applicableinstructions.Theconventionalpre-writingandafter-writinginstructionsareconvenientandhelpful.Oftenforstudents,concreteandspecificcommentscanhelpthemmorethanpost-writingcomments,whichleavesmoresuggestionsandhopetostudentsthanspecifichelp.Inmodeledcompositiontheteacherofferssuggestionsinthebeginning,attheend,andmosthelpfully,inthemargins.Thesespecificformsofsuggestionscancomeinbothcontentandform,andcaninvolvemacroandmicrolanguagepoints.Differentgenresofinstructionofwritingcanbemodeled.Themodelscanbegivenorally,inwriting,byelectronicandconventionalmeans.Keywords:instruction,composition,undergraduatewritingIntroductionInteachingcomposition,teacherssometimeslamentsforbeingunabletohelpwithcontentandform,withstructureaswellasexpression.Forlowerintermediatelearners,inparticular,veryfundamentalorgrammaticalaspectscanappearasveryurgentifthesemeanagoodstarting-pointtomakeprogress.Theymayexpecttheteachertoimparthisorherexperienceinplanning,formattingandoutliningthewholeprose.Theymayalsoexpecthimorhertogivetheexpertiseastotheapproachandattitudetospecialgenre,suchasEST.Tofulfillsuchademandingtasksuccessfully,itisindeednecessarytobreakthewholeprosewritingintosmallbitsandtomakeitmanageableandapproachable.Insuchcase,asingleparagraph,ratherthananentirelyessaymaybemoreusefulthanalongtextasthebasisonwhichtosetthemodels……

简介：Anovelpre-ionizationschemeofhelicaltransverse-pulsedpre-ionizationinalongitudinaldischargeCO2laserispresented.Thelasertubeismadeofglasswithinnerdiameterof7.5mmanddischargelengthof50cm.Thelaserperformancecharacteristicsasfunctionsofparameters,suchaspressure,chargingcapacitanceandappliedvoltage,areinvestigated.Comparedwiththesamelaserstructurewithoutpre-ionization,themaximumpulseenergyimprovesby23%,theoptimumelectro-opticalefficiencyincreasesby31%,andthespecificoutputenergyreaches26J/(L·atm).

简介：Fora〈r〈b,theapproachofLiandZhou（2014）isadoptedtofindjointLaplacetransformsofoccupationtimesoverintervals（a,r）and（r,b）foratimehomogeneousdiffusionprocessbeforeitfirstexitsfromeitheraorb.Theresultsareexpressedintermsofsolutionstothedifferentialequationsassociatedwiththediffusionsgenerator.Applyingtheseresults,weobtainmoreexplicitex-pressionsonthejointLaplacetransformsofoccupationtimesforBrownianmotionwithdrift,BrownianmotionwithalternatingdriftandskewBrownianmotion,respectively.

简介：Pre-mRNAsplicingisafundamentalprocessrequiredfortheexpressionofmostmetazoangenes.Itiscarriedoutbythespliceosomethatcatalyzestheremovalofnon-codingintronsequencestoligateexonsintomaturemRNApriortotransportandtranslation.Thepurposeofourstudyistoexplorewhethertheinvitrounlabeledpre-mRNAsplicingassaycouldbeperformedasanalternativemethodofsplicingreactionotherthantheradiolabeledone.Twodifferentsplicingmethodsinvitro,Plabeledandunlabeledpre-mRNAasthesubstratesinthereaction,wereinvestigated.TheradiolabeledproductswerevisualizedbyautoradiographywhiletheunlabeledproductswereobservedbyEthidiumBromide(EB)staining.Asaresult,althoughtherearemoreunspecificbandsintheEBstainingassaythan32Plabeledone,theRNAproductsofinvitrosplicingcouldbeobservedclearly.Thissuggeststhattheunlabeledpre-mRNAsplicingassaycanbeanoptionalsubstitutionfortheisotope-labeledassay.

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简介：Palm的粉丝们等待这一时刻已经有很长的时间了，这次借着推出全新的操作系统WebOS．PalmPre这款新机也成为大众关注的焦点。要知道该产品发布后．Palm的股价在两天内上涨了70％之多，从中自然可以看出业界对其前景的看好程度。