阿摩線上測驗
12.Many factors lead to land ______, including soil erosion, desertification, and loss of vegetation cover.
(A) acquisition
(B) distribution
(C) degradation
(D) reclamation
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統計： A(72), B(220), C(268), D(54), E(0) #3108229
統計： A(72), B(220), C(268), D(54), E(0) #3108229
