阿摩線上測驗
21. Prices and inventory levels ________ considerably from week to week, in part predictably (e.g., due to seasonal shifts in demand) and in part unpredictably.
(A) merge
(B) vibrate
(C) fluctuate
(D) move
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統計： A(6), B(5), C(21), D(45), E(0) #1884229
統計： A(6), B(5), C(21), D(45), E(0) #1884229
