【单选题】
A <{p}><{font _mstmutation="1" _msttexthash="10117965" _msthash="475"}>仅 AB 区间;<{/font}><{br/}><{/p}>
B <{p}><{font _mstmutation="1" _msttexthash="8278153" _msthash="351"}>.BC 区间<{/font}><{br/}><{/p}>
C <{p}><{font _mstmutation="1" _msttexthash="12549394" _msthash="523"}>光盘区间;<{/font}><{br/}><{/p}>
D <{p data-we-empty-p="" _msttexthash="21976734" _msthash="307"}>AB 区间和 DE 区间<{/p}>
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