【UnitedStatesPresidentGeorgeW.Bushisexpectedtoissueadirectiveinthenextfewweeks.ItwillgivetheUSAirForceagreenlightforthedevelopmentofspaceweaponsUSmediareportedlastweek.Thiswouldpotentiallystartan】

　　UnitedStatesPresidentGeorgeW. Bushisexpectedtoissueadirectiveinthenextfewweeks. ItwillgivetheUSAirForceagreenlightforthedevelopmentofspaceweaponsUSmediareportedlastweek.

　　Thiswouldpotentiallystartanewglobalarmsracesomeexpertshavewarned.

　　TokeepthatfromhappeninglastWednesdaytheWhiteHouseexplainedthatitwasnotconsideringputtingweaponsinspace. ItsaiditwasmakingashiftinUSspacepolicytoallowforprotectionofsatellites.

　　ButsomedefenseanalystsandarmscontroladvocatesarguethatthepolicywillpavethewayfortheUStoputbothdefensiveandoffensive(攻击性的)weaponsinspace.

　　“Nooneshouldbefooled”saidTheresaHitchensanAmericanweaponsexpert.

　　TheUSisnowrestrictedbya1996directive signedbyPresidentBillClinton. Plansforspaceweaponswerevetoed(否决)bytheClintoncabinet. Thedirectiveemphasizedthepeacefuluseofspaceinagreementwithalmostunanimous(一致的)globalopinion.

　　TheUSmilitaryhasplacedimportanceonspaceandhassentupnumberoussatellitesfortroopcommunicationsandtoprovideintelligenceanddatatoguidebombstotheirtargets.

　　TheUSAirForcewantstodevelopspace-basedweaponsthatcouldstriketargetsanywhereintheworldwithin90minutesofreceivingtheordertoopenfire.

　　Thesenewweaponsunderdevelopmentcoverawiderange. Theyincludehunter-killersatellitesandorbitingweapons. Andtheyuselasersradiowavesorevendensemetaltubesknownas“RodsfromGod”droppedfromspacetodothedamage.

　　Therearemanybarrierstothesettingupofthiskindofprogramexpertssay.

　　Firstisthecoast. ItisestimatedthatthebudgetmaybeUS$220billiontoUS$1trillion(万亿).

　　Thetechnicaldifficultiesofdevelopingreliablespaceweaponsarealsoaproblem.

　　Andtheprogramwilldrawstrongcriticismfromaroundtheworld. Expertsworryaboutstartingaspacearmsrace.

　　53.Whichofthefollowingmightbethebesttitleforthepassage?

　　A.USMilitaryPlans

　　B.TheGlobalArmsRace

　　C.AComparisonbetweenTwoPresidents

　　D.PresidentGeorgeW. BushandtheWorldPeace

　　54.Accordingtothispassagewhichofthefo