黄河口湿地的成因是: A.黄土高原水土流失  B.渤海海区不断下沉

黄河口湿地的成因是:

A.黄土高原水土流失  B.渤海海区不断下沉

C.海水的堆积作用  D.河流的堆积作用

答案

D


解析:

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