资料：Mostyoungpeopleenjoysomeformofphysicalactivity.Itmaybewalking,cyclingorswimming,orinwinter,skatingorskiing.Itmaybeagameofsomeforms,football,hockey,golf,ortennis.Itmaybemountaineering. Thosewhohaveapassionforclimbinghighanddifficultmountainsareoftenlookeduponwithastonishment.Whyaremenandwomenwillingtosuffercoldandhardship,andtotakerisksonhighmountains?Thisastonishmentiscausedprobablybythedifferencebetweenmountaineeringandotherformsofactivitytowhichmengivetheirleisure. Mountaineeringisasportandnotagame.Therearenoman-maderules,asthereareforsuchgamesasgolfandfootball.Thereare,ofcourse,rulesofadifferentthingthatitwouldbedangeroustoignore,butitisthisfreedomfromman-maderulesthatmakesmountaineeringattractivetomanypeople.Thosewhoclimbmountainsarefreetousetheirownmethods. Ifwecomparemountaineeringandothermorefamiliarsports,wemightthinkthatonebigdifferenceisthatmountaineeringisnota'teamgame'.Weshouldbemistakeninthis.Thereare,itistrue,no'matches'between'teams'ofclimbers,butwhenclimbersareonarockfacelinkedbyaropeonwhichtheirlivesmaydepend,thereisobviouslyteamwork. Themountainclimberknowsthathemayhavetofightforcesthatarestrongerandmorepowerfulthanmen.Hehastofighttheforcesofnature.Hissportrequireshighmentalandphysicalqualities. Amountainclimbercontinuestoimproveinskillyearafteryear.Askierisprobablypasthisbestbytheageofthirty,andmostinternationaltennischampionsareintheirearlytwenties.ButitisnotunusualformanoffiftyorsixtytoclimbthehighestmountainsintheAlps.Theymaytakemoretimethanyoungermen,buttheyprobablyclimbwithmoreskillandlesswasteofeffort,andtheircertainlyexperienceequalenjoyment. Mountaineerscompeteagainst___.
A.nature B.each other C.other teams D.international standards正确答案A
