一道英语阅读题:Theword“colossal”inLine3mostlikelymeans________.Computersmayonedayturnnightintoday—withgoodold,naturalsunlight.Colossalcomputer-controlledmirrors,thousandsoffeetacross,mayonedayorbittheearth,
一道英语阅读题:Theword“colossal”inLine3mostlikelymeans________.
Computersmayonedayturnnightintoday—withgoodold,naturalsunlight.
Colossalcomputer-controlledmirrors,thousandsoffeetacross,mayonedayorbittheearth,reflectingsunlightontoadarkenedUnitedStates.
SomeScientistssaythat16ofthesemirrors,eachaboutahalfmileacross,couldaimtheirreflectedlightatoneareaontheearththatwasabout200milesby300miles.Thatmuchlightwouldequalabout56moons.
Themirrorswouldbesohighthattheycouldcatchthesun’slightasitwasshiningontheothersideoftheearth.Themirrorscouldorbit—thousandsofmileshigh—atthesamespeedastheearthturnsonitsaxis(轴).Thatway,the
mirrorswouldalwaysbeoverthesamespot.
Thealuminum-coated(涂铝的),plasticmirrorscouldbefoldedupandpackedintoaspaceship,accordingtothescientists.Oncereleasedafewhundredmilesinspace,themirrors,poweredbyasolar-poweredengine,couldmarktherestofthetripintospaceontheirown.
Thescientistssaythatthecomputer-controlledmirrorscouldalsobemadetotilt(倾斜)slowly,sothereflectedsunlightwouldsweepslowlyalongthesurfaceoftheearth.Forexample,asnightfell,themirrorscouldbetiltedtolightupBoston.Lateron,asdarknessspreadslowlywestward.Chicago,forexample,thenSanFranciscocouldbelitup.Thereflectedsunlightwouldallowthesecitiestosaveupelectricity.Andinemergencies,suchaspower-failures,themirrorscouldlightuptheaffectedarea.
Whatnooneknowsyetiswhateffectthisartificialdaytimewouldhaveonplants,animals,andhumans.Woulditconfusesomeanimalsandharmplantsthatareusedtoregularday-nightcycles?Thescientistsrecommendthatstudiesbedonetofindoutwhathadeffectstheremightbe.
Theword“colossal”inLine3mostlikelymeans________.
A)nuclear-powered
B)orbiting
C)giant
D)spinning(D)
为什么选D啊?