問題詳情
5.根據資料,1996 年 8 月黃河下游花園口發生 7,600 立方公尺/秒的洪水量,水位卻較 1958 年發生 22,300立方公尺/秒的洪水量時還高 0.91 公尺。造成此種現象的主要原因為何?
(A)人工加高堤防
(B)河床嚴重淤積
(C)河道被截彎取直
(D)農地占用氾濫平原。
(A)人工加高堤防
(B)河床嚴重淤積
(C)河道被截彎取直
(D)農地占用氾濫平原。
參考答案
答案:B[無官方正解]
難度:適中0.666667
統計:A(1),B(4),C(1),D(0),E(0)
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