問題詳情
10. 為了使石門水庫的使用年限增長，下列哪一種方法較有效果？
(A)在上游挖沙石
(B)在下游挖沙石
(C)在上游建攔沙壩
(D)在下游建攔沙壩。
(A)在上游挖沙石
(B)在下游挖沙石
(C)在上游建攔沙壩
(D)在下游建攔沙壩。
參考答案
答案：C
難度：計算中-1
書單：沒有書單，新增
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