南方丘陵山区和黄淮海平原.东北平原相比较:             

南方丘陵山区和黄淮海平原.东北平原相比较:                             

A.光热水资源优势明显,无热量和水分的限制因素

B.土壤为酸性红壤,土地产出远不及东北平原和黄淮海平原

C.生物品种丰富,生长速度快,更新能力强,林木木质坚硬

D.生态环境比较脆弱,水土流失问题严重

答案

D

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