阿摩線上測驗
6. Although the feeding activities of whales and walruses give the seafloor of the
Bering Shelf a devastated appearance, these activities seem to be actually _____
to the area, enhancing its productivity.
(A) detrimental
(B) rehabilitative
(C) beneficial
(D) superfluous
答案：登入後查看
統計： A(27), B(59), C(290), D(10), E(0) #1821496
統計： A(27), B(59), C(290), D(10), E(0) #1821496
