阿摩線上測驗
3. Growing betel nut trees on steep mountain slopes leads to loss of topsoil and land
deterioration.
(A) upgrading
(B) degrading
(C) improving
(D) developing
答案：登入後查看
統計： A(8), B(309), C(10), D(12), E(0) #1368632
統計： A(8), B(309), C(10), D(12), E(0) #1368632
