C 　　Somepeoplewonderwhycountriesspendmillionsofdollarsonspaceprojects.TheywanttoknowhowspaceresearchhelpspeopleonEarth.Actually,spacetechnologyhelpspeopleonEartheveryday.Thisiscalled“spinofftechnology”.SpinofftechnologyisspacetechnologythatisnowusedonEarth. 　　flashlight 　　Inearlyspaceprograms,suchastheApollomissions(任务)ofthe1960sand1970s,andinthespaceshuttlemissionstoday,scientistsdevelopedobjectsfortheastronauts(spacemen)touseonthemoonandinspace.Wenowusesomeoftheseobjectseveryday.Forexample,wehaveQuartzclocksandwatcheswithanaccuracyofoneminuteayear.Wepurifythewaterwedrinkwithawaterfilter(过滤器)designedfortheastronauts’useinspace.Thecordless,hand-heldtoolsweuseinourhomes,suchascleaners,flashlights,drills,andironscamefromthetechnologyoftheseearlyspaceprograms. 　　batteries 　　Oncoldwinterdays,wecanstaywarmwithbattery-operatedshoesandsocks,andinsulated(绝缘的)coatsandjackets.Alloftheseclothesaresimilartothespacesuitdesignsthatkeptastronautscomfortableinthetemperaturesofthemoon,andarespinoffsfromspacetechnology. 　　Theseproductsareonlyafewexamplesofthemanywaysspacetechnologyhelpsusinoureverydaylife.NooneknowshownewspinofftechnologyfromtheInternationalSpaceStationwillhelpusinthefuture. 　　51.WhichofthefollowingisNOTaspinoff? 　　A.Waterfilters. 　　B.Quartzwatches. 　　C.Battery-operatedsocks. 　　D.Spacesuitswornbyastronauts. 　　52.Whichofthefollowingisthebesttitleofthepassage? 　　A.FutureofSpaceTechnology 　　B.AdvantagesofSpinoffs 　　C.SpinoffTechnology 　　D.SpaceProjects 　　53.Wecaninferthatthewriter_______. 　　A.suggestsusingmorespinoffsinourdailylife 　　B.agreestodomoreresearchonspinofftechnology 　　C.doubtsifspinoffshaveanygoodeffectonhumanbeings 　　D.believesthatspacetechnologywillbewidelyusedonEarth 　　你看是这套么