阅读理解。Mostpeoplewhentheytraveltospacewouldliketostayinorbitforafewdaysormore.Andthisstandstoreasonifyou'repaying$20000foryourtriptoorbit!Soin

　　阅读理解。 Mostpeoplewhentheytraveltospacewouldliketostayin

　　orbitforafewdaysormore.Andthisstandstoreasonifyou're

　　paying$20000foryourtriptoorbit! Soinorderfortourismto

　　reachitsfullpotentialthere'sgoingtobeaneedfororbital

　　accommodation-orspacehotels.Whatwouldaspacehotel

　　actuallybeliketovisit?Hotelsinorbitwilloffertheservicesyou

　　expectfromahotel-privateroomsmealsbars.Butthey'llalso

　　offertwouniqueexperiences:impressiveviews-ofEarthand

　　space~andtheendlessentertainmentoflivinginzerogravity-

　　includingsportsandotheractivitiesthatmakeuseofthis.

　　Thehotelsthemselveswillvarygreatly-frombeingquite

　　simpleintheearlydaystohugeluxurystructuresatalaterdate.

　　It'sactuallysurprisingthataslateras1997veryfewdesignsfor

　　spacehotelswerepublished.Thisismainlybecausethosewho

　　mightbeexpectedtodesignthemhaven'texpectedlauchcoststo

　　comedownfarenoughtomakethempossible.

　　Lotsofpeoplewho'vebeentospacehavedescribedvividly

　　whatit'sliketoliveinzerogravity.Thereareobviouslyallsortsof

　　possibilitiesfordancinggymnasticsandzero-Gsports.Luckily

　　youdon'tneedtosleepmuchlivinginzerogravitysoyou'llhave

　　plentyoftimeforrelaxingbyhangingoutinabarwithawindow

　　lookingdownattheturningEarthbelow.

　　Ofcourseallgoodthingshavecometoanendunfortunately.

　　Andsoafterafewdaysyou'llfindyourselfheadingbackthough

　　you'llbemuchmoreexpertatexercisinginzerogravitythanyou

　　werewhenyouarrived.You'llbethinkinghowsoonyoucansave

　　upenoughtogetbackupagain-ormaybeyoushouldchangejobs

　　togettoworkinanorbitinghotel!1.Whentravelinginspacemostpeoplewouldliketostayinorbitforafewdaysbecause____. A.itisexpensivetotravelinspace

　　B.theywouldfindthepossiblelifeinotherstarsystems

　　C.theycouldenjoytheluxuryofspacehotels

　　D.theywanttorealisethefullpotentialoftourism