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职称英语综合类阅读理解10.docx

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职称英语综合类阅读理解10职称英语综合类阅读理解10PASSAGE20RocketsintheSky?Ifsomeoneaskedyou,"Whatcoloristhesky?"Iexpectthatyouwouldanswer,"Blue."Iamafraidthatyouwouldbewrong.Theskyhasnocolor.Whenweseeblue,wearelookingatbluesunlight.Thesunlightisshiningonlittlebitsofdustintheair.Weknowthatthereisairallaroundtheworld.Wecouldnotbreathewithoutair.Airplanescouldnotflywithoutair.Theyneedairtolifttheirwings.Airplanescannotflyveryhighbecauseastheygohighertheairgetsthinner.Ifwegofarenoughawayfromtheearth,wefindthereisnoair.Whatisthesky?Theskyisspace.Inthisspacethereisnothingexceptthesun,themoonandallthestars.Scientistshavealwayswantedtoknowmoreabouttheotherworldsinthespace.Theyhavelookedatthemthroughtelescopesandinthiswaytheyhavefoundoutagreatdeal.Themoonisabout384,000kilometersawayfromtheearth.Anairplanecannotflytothethatcanflyevenwhenthereisnoair.Thisisrocket.Iamsurethatyouareasking,"Howdoesarocketfly?"ifyouwanttoknow,getaballoonandthenblowitupuntilitisquitebig.Donottieuptheneckoftheballoon.Letgo!Theballoonwillflyoffthroughtheairveryquickly.Theairinsidetheballoontriestogetout.Itrushesoutthroughneckoftheballoonandthispushestheballoonthroughtheair.Itdoesnotneedwingslikeanairplane.Thisishowarocketworks.Itisnotmadeofrubberlikeaballoon,ofcourse.Itismadeofmetal.Themetalmustnotbeheavybutitmustbeverystrong.Thereisgasinsidetherocketwhichismadeveryhot.Whenitrushesoutoftheendoftherocket,therocketispushedupintotheair.Rocketscanflyfatoutintospace.Rocketswithmeninsidethemhavealreadyreachedthemoon.Severalrockets,withoutmeninsidethem,havebeensenttootherworldsmuchfartheraway.Onedayrocketsmaybeabletogoanywhereinthespace.练习：1.Whatcoloristhesky?A)Itisblue.B)Itiswhite.C)Itisgrey.D)Ithasnocolor.2.Whenanairplanefliestoohigh,A)theairwillbetoothintosupportitswings.B)theairwillbecomethicker.C)theairwillexertpressureonit.D)theairwilldisappearinnotime.3.ArocketcanflytothemoonbecauseA)itlookslikeaballoon.B)itismuchlighterthananairplane.C)itdoesn#39;thavewings.D)itworkslikeanuntiedballoon.4.Whichofthefollowingstatementsabout