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CThenextgreatlandareathatmanhopestocontrolisthemoon.InsizeitisnearlyequaltotheareaofNorthandSouthAmerica.However,itpresentsahostile(不友好的)environment.Temperaturesrange+120to-150degreesCentigrade(
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更新时间:2024-04-23
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C

Thenextgreatlandareathatmanhopestocontrolisthemoon.InsizeitisnearlyequaltotheareaofNorthandSouthAmerica.However,itpresentsahostile(不友好的)environment.Temperaturesrange+120to-150degreesCentigrade(摄氏).Thereisnoair,andnowater.

Todaythereisconsiderablescientificspeculation(思索)aboutlivingonthemoon.Whenmanwillbeginlifeonthemoonsurfaceisstillnotdetermined.Butexpertsbelievethatsettlementwilltakeplaceinthreesteps.First,therewillbeincreasingperiodsofexplorationwithtemporaryshelters(临时住所).Theseperiodswillbefollowedbylongerstayswithhousingunderthesurfaceofthemoonanddailynecessitiesbroughtbythesettlersthemselvesfromtheearth.Finally,settlementsthatareself-supportingwillbefounded.

Themainjoboftheearlysettlerswillbetostayalive.Theywillhavetoplantcropsunderhugedomes(圆顶屋)toproducefoodandoxygenandfindwatersources.Afterthisisdone,thesettlerswillhavetimetoexplorethepossibilitiesofcommercial(商业的)developmentandtomakediscoveriesimportanttoscience.Thecharacteristicsofthemoonthatmakeitbadforhumanstayingalivemaymakeitidealforcertainkindsofmanufacturing(制造业).Operationsrequiringavacuum(真空)orextremecoldareexamples.Therefore,industrialdiamondsmightbeproducedonthemoon.

64.Theareaofthemoonis_________.

A.aboutthesameasthatofNorthandSouthAmerica

B.largerthanthatofNorthandSouthAmerica

C.hardlyequaltothatofNorthandSouthAmerica

D.farsmallerthanthatofNorthandSouthAmerica

65.Accordingtothispassage,thesettlementofthemoon________.

A.willsoonberealized

B.canbedoneunderthemoonsurface

C.isbeingexperimentedbymanyscientists

D.soundsentirelyimpossible

66.Tostayaliveonthemoon,theearlysettlersmustfirstofallbeableto________.

A.developcommerce

B.getenoughfood,oxygenandwater

C.makediscoveriesimportant

D.explorethepossibilitiesofindustrialdevelopment

67.Thoughtheenvironmentonthemoonisbadforhumanstayingalive,itisverygoodfor________.

A.makingsuchthingsasindustrialdiamonds

B.allkindsofmanufacturedgoods

C.medical

刘光宏回答:
  64---67  ACBA     略
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