翻译万有力与电磁力统一的内容b.docx

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1、rateisfastandslow,thechangeanplitudeislargeandsmall,andthefollowingisthechangecurveofthreekindsofgravityandrepulsion.GraphsofchangesingravitationalandrepulsiveForces6、latchtheESAprovethatnatteriselectricallychargedItalywaslockeddownfortwoweeks,andsatellitesspottedthesechangesIthasbeennearlytwoweekss

2、inceItalyimposedanationwidelockdownonMondaytopreventthefurtherspreadofthenovelcoronavirus.Fromthedistanceofspace,thebustlingcityofthepast,thedensecrowdislikeadensedot.InrecentsatelliteimagesofIlaly,thesquaresoflandmarkattractionssuchasRome,SColosseumandMilansCathedralhavebeencoveredbythesedotsal1yea

3、rround.ButafterMarch10,thedotssuddenlydisappeared.Inaddition,satelliteshavefoundthattheairqualityinIlolyhasimprovedasaresultofthelockdown.Inaddition,satelliteshavefoundthattheairqualityinItalyhasimprovedasaresultofthelockdown.Varioussensorscarriedbythesatellitecancollectelectromagneticwavesignalsofs

4、uspendedparticlesintheair,soastoanalyzeandjudgetheairquality,6、ThespectrometerprovedthattheatomswerechargedSpectrometerisalsoknownasspectrophotometer,differentlightsourceshavetheirownuniqueemissionspectrum,sodifereniluminariescanbeusedasthelightsourceoftheinstrument.Istheuseof1ightabsorptioninacerta

5、inwavelengthrange,qualitativeorquantitativeanalysisofsubstances.Theco11unonlyusedwavelengthrangesare:(1)ultravioletregionof200380rm,(2)visibleregionof380780rm,and(3)infraredregionof2.525in.Instrumentsaredividedintoultravioletspectrophotometers,visiblelightSPeCtToPhOtOmeterS(orcolorimeters),infraredS

6、pectrophotomotersoratomicabsorptionspectrophotometers.SpectrophotometerusesHlightsourcethatcanproducemultiplewavelengths,throughaseriesofspectrophotometriedevices,therebyproducingaspecificwavelengthlightsource,1ightthroughthetestsample,partofthelightisabsorbed,calculatetheabsorptionvalueofthesample,

7、whichisconvertedintotheconcentrationofthesample.Theabsorptionvalueofthesampleisproportionaltotheconcentrationofthesample.Whenthemonochromaticlightradiationpassesthroughthemeasuredsubstancesolution,theamountabsorbedbythesubstanceisproportionaltotheconcentrationofIhesubstanceandthethicknessofthe1iquil

8、layer(thelengthoftheopticalpath),therelationshipisasfollows:A=-lg(O)=lgT=k1.cWhere:Aisabsorbance;IOistheincidentmonochromatic1ightintensity：I为透射的单色光强度：Tisthetransmittanceofthesubstance：kisIhemolarabsorptioncoefficient;1.istheopticalpathoftheanalyzedsubstance,thatis,thesidelengthothecupola;cistheconc

9、entrationofthesubstance;Thereareinfraredanalyzer,visible1ightanalyzer,ultravioletanalyzer,atomicabsorptionspectrophotometerandsoon.Atomicabsorptionspectropholoneter:ThedevicethatusestheresonantradiatinoftheelementtobemeasuredthroughitsatomicvaportodetermineitsabsorbanceiscalledanatomicabsorptionSpec

10、trophotomcter.Ithassinglebeam,doublebeam,doublechannel,multi-channelandotherstructuralforms.ItisoneoftheconventionalinstrumentsforanalysisoftraceUndtracecomponentsinsamples.Itisapowerfultoolformaterialanalysisandqualitycontroldepartmenttoanalyzemajorandtracemetals(serai-metals).Fluorescencespectroph

11、otometerisaninstrumentusedtoscanthefluorescencespectrumemittedbyfluorescentlabelsintheliquidphase,whichisusedinscientificresearch,chemicalindustry,medicine,biochemistry,environmentalprotection,clinicaltesting,foodIesling,leachingexperimentsandotherfields.Throughthedeterminationoftheseparameters,Weca

12、nnotonlydogeneralquantitativeanalysis,butalsoinfertheconformationalchangesofcopied.Onlyonebasepaircopyerroroccurs.Thereisnoneedforone-to-onecorrespondencebetweenthebasesonRN,andaboutevery10,000to1mi1lionbases,therewillbeamistake,soitiseasytohavegeneticmutations*DNAfcRNAtt*H0M.A!,.Insixhours,avirusca

13、nreplicatoitself6t000times,sothevirusisveryeasytomutate.Notallmutatedvirusescansurvive,becausethegeneticmutationisdirectionless,andifthedirectionofthegeneticmutationdoesnothelpthevirusadapttotheenvironment,theviruswillbeeliminated.Onlyafewbasemutationsatkeysitescausethevirustomutate.AccordingIothest

14、udy,amutationoccurredalsite28144oftheRNgenomeofthevirus.The1.subtypeistheTbaseandtheSsubtypeistheCbase.InbothRNAandDNA1thebasesthatmakercplicationerrorsarcrandom,meaningthatmutationsaredirectionless.Theforceofthematerialandparticles(genes)inthemiddleoftheviralcellisbasicallybalanced,andtheforceofthe

15、RNgeneisbasicallynobalanceforce,anditisunstable,becausethegravitationalforceisgreaterthantherepulsiveforce,thematerialincreases,therepulsiveforceisgreaterthanthegravitationalforce,thematerialdecreases,thegravitationalforceandIherepulsiveforceconvertquickly,thenewmaterialisadded,andtheoriginalmateria

16、lischanged.4.2,Healthfactor.：Healthmeansthatapersonisingoodphysical,mentalandsocialcondition.HealthincludesIwoaspects:first,thereisnodiseaseinthemainorgans,thebodyshapeiswelldeveloped,thebodyshapeisuniform,thebodysystemhasgoodphysiologicalfunction,hasstrongphysicalactivityabiIityandlaborability,whichisthemostbasicrequirementforhealth;Second,ithasstrongresistancetodiseaseandcanadapttoenvironmentalchanges,va