阿摩線上測驗
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
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統計： A(7), B(15), C(31), D(9), E(10) #938259
統計： A(7), B(15), C(31), D(9), E(10) #938259
