At thE Bottom oF thE worlD liEs A mighty ContinEnt still wrAppED in thE iCEAgE AnD, until rECEnt timEs, unknown to mAn. it is A grEAt lAnD mAss CrissCrossED (交叉往来) By mountAin rAngEs whosE{{u}} (62) {{/u}}AnD hEight ArE still unCErtAin. muCh oF thE ContinEnt is A ComplEtE BlAnk on our mAps.A、1 000-milE{{u}} (63) {{/u}}oF thE CoAstlinE hAs nEvEr BEEn{{u}} (64) {{/u}}By Any ship. mAn hAs{{u}} (65) {{/u}}, on Foot, lEss thAn onE pErCEnt oF its ArEA、 AntArCtiCA DiFFErs slightly{{u}} (66) {{/u}} thEArCtiC rEgions. thEArCtiC is An oCEAn, CovErED with{{u}} (67) {{/u}}pACkED iCE AnD surrounDED By thE lAnD mAssEs oFEuropE,AsiA, AnD northAmEriCA、thEAntArCtiC is A ContinEnt{{u}} (68) {{/u}}As lArgE AsEuropE AnDAustrAliA{{u}} (69) {{/u}}, CEntErED roughly on thE south polE AnD surrounDED By thE most{{u}} (70) {{/u}}wAtEr ArEAs oF thE worlD—thEAtlAntiC, pACiFiC AnD inDiAn oCEAn. thE ContinEntAl iCE pACk is morE thAn two{{u}} (71) {{/u}}high At its CEntEr; thus, thE Air ovEr thEAntArCtiC is FAr morE rEFrigErAtED (冰冻的) thAn it is ovEr thEArCtiC rEgions. this ColD Air FAlls{{u}} (72) {{/u}}thE lAnD with suCh ForCE thAt it{{u}} (73) {{/u}}thE nEArBy sEAs thE stormiEst in thE worlD AnD rEnDErs{{u}} (74) {{/u}}thosE rEgions whosE{{u}} (75) {{/u}}At thE oppositE EnD oF thE gloBE ArE inhABitED、{{u}} (76) {{/u}}, morE thAn A million pErsons livE{{u}} (77) {{/u}}2 000 milEs oF thE north polE in An ArEA thAt{{u}} (78) {{/u}}most oFAlAskA, siBEriA, AnD sCAnDinAviA—A{{u}} (79) {{/u}}riCh in ForEst AnD mining inDustriEs.ExCEpt For A hAnDFul oF{{u}} (80) {{/u}}stAtions, within thE sAmE DistAnCE oF thE south polE thErE is not A(An){{u}} (81) {{/u}}trEE, inDustry, or sEttlEmEnt.

A．ConFrontAtion
B．ConjunCtion
C．CountErpArts
D．ConsEnsus