阿摩線上測驗
14. Which of the following does the passage identify as examples of plant waste products?
(A) Potassium and phosphates
(B) Clover
(C) Trace elements
(D) Com stalks and bean vines
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統計： A(24), B(19), C(24), D(73), E(0) #801537
統計： A(24), B(19), C(24), D(73), E(0) #801537
