What' s the main point of this passage？
A. Few para-parents are willing to take on real responsibility for the child' s well-being.
B. Divorce damages children.
C. Divorce damages the voluntary link between the children and father.
D. All of the above.
坐落于某处的房地产,土地面积为2500m2,建筑物的建筑面积为5000m2,土地价格为2000元/m2,该类建筑物的重置价格为1800元/m2,该地区市场上类似房地产的正常房地价格为2500元/m2,则该建筑物的实际单价比其重置价值低()元。
A. 200
B. 300
C. 350
D. 400
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