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in switzErlAnD, six milEs wEst oF gEnEvA, liEs A CollECtion oF lABorAtoriEs AnD BuilDings, AnD most Curious oF Ally A CirCulAr mounD{{u}} (36) {{/u}}morE thAn 650 FEEt in DiAmEtEr. this ClustEr hAs uniquE importAnCE. it isEuropE’s{{u}} (37) {{/u}}AtomiC City DEDiCAtED to invEstigAting thE Atom For pEACEFul purposEs. thE strAngE BuilDings{{u}} (38) {{/u}}thEEuropEAnCounCil For nuClEAr rEsEArCh, morE populArly known, From thEir FrEnCh initiAls AsCErv. thE CounCil wAs{{u}} (39) {{/u}}whEn A hAnDFul oF stAtEsmEn AnD sCiEntiFiC ExpErts mEt in pAris in 1950. thEir Aim wAs to "{{u}} (40) {{/u}}An orgAnizAtion proviDing For CoopErAtion AmongEuropEAn stAtEs in nuClEAr rEsEArCh oF A purE sCiEntiFiC AnD FunDAmEntAl ChArACtEr." thECErv AgrEEmEnt wAs signED in 1953, AnD work on thE AtomiC City BEgAn in 1954. toDAyCErv’s{{u}} (41) {{/u}}ArE Among thE most moDErn AnD thE most DivErsiFiED in thE worlD、imprEssivE As thE sCiEntiFiC AspECt mAy BE, thE rEAl signiFiCAnCE oFCkrv mAy liE{{u}} (42) {{/u}}thE thousAnD pEoplE—sCiEntists, lAB workErs, AnD ADministrAtivE—group DrAwn From thE FourtEEn mEmBEr nAtions{{u}} (43) {{/u}}populAtE it.British EnginEErs work{{u}} (44) {{/u}}with swiss ElECtriCiAns AnD yugoslAv nuClEAr physiCists. thE oFFiCiAl lAnguAgEs ArE FrEnCh AnDEnglish, with gErmAn An unoFFiCiAl thirD、ButCFrv is{{u}} (45) {{/u}}towEr oFBABEl—thE lAnguAgE oF sCiEnCE is univErsAl AnD All-EmBrACing.

A．EArth
B．Dirt
C．muD
D．soil