【单选题】
A <{p}><{font _mstmutation="1" _msthash="20489" _msttexthash="3318068"}>4米<{/font}><{br/}><{/p}>
B <{p}><{font _mstmutation="1" _msthash="20490" _msttexthash="3317886"}>2米<{/font}><{br/}><{/p}>
C <{p}><{font _mstmutation="1" _msthash="20491" _msttexthash="3318250"}>6米<{/font}><{br/}><{/p}>
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