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【单选题】
有关地理区域含义的正确叙述是 ①区域是地理差异的客观反映 ②区域有一定面积、形状、范围或界线 ③区域相对于外界有差异，而内部特征完全一样 ④区域特性与其区位没有关系 [     ]
A.
①②
B.
②③
C.
③④
D.
①④
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