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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?
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。
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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五、下列化合物,何者具有光學活性?何者不具有光學活性?(每小題 2 分,共 10 分)。
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35. 下表中的A民族的字母是整個西方世界拼音文字的始祖,其文字概念可能受埃及文字的影響,試判斷A民族應是上古那一民族? (A)西臺人 (B)迦爾底亞人 (C) 腓尼基人 (D) 米堤人
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