Theageofspacesciencebeganlessthanthirtyyearsago.Butalreadypeoplehavemadegreatdiscoveriesandhavedoneexcitingthings.Theyhavewalkedinspace,visitedthemoon,andlivedinspacelaboratoriesforlongworkingonwaystomakeitposs
Theageofspacesciencebeganlessthanthirtyyearsago.Butalreadypeoplehavemadegreatdiscoveriesandhavedoneexcitingthings.Theyhavewalkedinspace,visitedthemoon,andlivedinspacelaboratoriesforlongworkingonwaystomakeitpossibleforpeopletoperiodsoftime.Somescientistsarenowliveonotherplanets.Theyaretryingtosolveproblemsoflivinginspace,eventhoughtheydon’tyetknowwhatalloftheproblemswillbe.Forexample,theydon’tyetknowwhatproblems
peoplewouldhaveiftheylovedbeingweightlessforseveralyears.
Ifyouwereaspacetraveleryoumighthavetospendseveralmonths,orevenyearsinaspaceship.Whileyouwereintheshipyouwouldn’tliveasyouusuallydo.Youmighthavetofindnewwaystospendyourtime.Yourbodywouldhavetoadjusttodifferentconditions.AndyouwouldhavesomeproblemsthatyouneverthinkabouthereonEarth.Forexample,youwouldhavetohaveahugesupplyoffoodwithyoubecauseyoucan’tgotothesupermarketwhenyou’rehalfwaytoanotherplanet.Youalsowouldneedfreshwaterandawaytogetridofwaste.Infact,therewouldbemanyproblemstosolveinordertoliveinspace.
3.Thephrase"ahugesuppleoffood"means_____
A.ahugepieceoffood
B.thefoodthatislargelysuppliedonthemarket
C.alargeamountoffood
D.thefoodatthesupermarket
4.Whileyouwereinthespaceship,youwouldNOT__
A.needfreshwaterandawaytogetridofwaste
B.havesomeunusualproblems
C.gotothesupermarketwhenyouwerehalfwaytomaotherplanet
D.findnewwaystospendyourtime