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职称英语考试理工B阅读最后冲刺2018年职称英语考试理工B阅读最后冲刺Alwaysbearinmindthatyourownresolutiontosucceedismoreimportantthananyonething.以下是小编为大家搜索整理的2018年职称英语考试理工B阅读最后冲刺，希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!TheRussianMirSpaceStation,whichcamedownin2001atlastafter15yearsofpioneeringtheconceptoflong-termhumanspaceflight,isrememberedforitsaccomplishmentsinthehumanspaceflighthistory.Itcanbecreditedwithmanyfirstsinspace.DuringMir'slifetime,RussiaspentaboutUS$4.2billiontobuildandmaintainthestation.TheSovietUnionlaunchedMir,whichwasdesignedtolastfromthreetofiveyears,onFebruary20,1986,andhoused104astronautsover12yearsandsevenmonths,mostofwhomwerenotRussian.Infact,itbecamethefirstinternationalspacestationbyplayinghostto62peoplefrom11countries.From1995through1998,sevenastronautsfromtheUnitedStatestookturnslivingonMirforuptosixmonthseach.Theywereamongthe37Americanswhovisitedthestationduringninestopoversbyspaceshuttles.Themorethan400milliontheUnitedStatesprovidedRussianforthevisitsnotonlykeptMiroperating,butalsogavetheAmericansandtheirpartnersintheinternationalstationprojectvaluableexperienceinlong-termflightandmultinationaloperations.AdebatecontinuesoverMir’scontributionstoscience.Duringitsexistence,Mirwasthelaboratoryfor23,000experimentsandcarriedscientificequipment,estimatedtobeworth$80million,frommanynations.ExperimentsonMirarecreditedwitharangeoffindings,fromthefirstsolidmeasurementoftherationofheavyheliumatomsinspacetohowtogrowwheatinspace.Butforthosefavouringhumanspaceexploration,MirshowedthatpeoplecouldliveandworkinspacelongenoughforatriptoMars.Thelongestsinglestayinspaceisthe437.7daysthatRussianastronautValeryPolyakovspentonMirfrom1994to1995.AndSergieAvdeyevaccumulated747.6daysinspaceinthreetripstothespacestation.ThelongestAmericanstaywasthatofShannonLucid,whospent188daysaboardMirin1996.DespitethemanyfirstsMiraccomplished,1997wasabadyearoutof15forMir.In1997,anoxygengeneratorcaughtfire.Later,themaincomputersystembrokedown,causingthestationtodriftseveraltimesandtherewerepowerfailures.Mostofth
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