下列哪一種做法對山崩或洪水災害的減緩最沒有幫助？　(A)造林植樹　 (B)剷光雜草　 (C)建排水溝　 (D)興建水庫。

問題詳情

6.下列哪一種做法對山崩或洪水災害的減緩最沒有幫助？　
(A)造林植樹　
(B)剷光雜草　
(C)建排水溝　
(D)興建水庫。

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