19. Which of the following properties of a river is the closest to the headwaters?
(A) Channel depth
(B) Mean flow velocity
(C) Bed material grain size
(D) Stream discharge volume
(E) Volume of stored alluvium
詳解 (共 3 筆)
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headwater是翻成源頭溪流，比較相...
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解析：河川的上游（headwaters）...
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The answer is (C) B...
阿摩線上測驗
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