79Which of the following is true about the role of farmers in preserving crop variety?
(A) Competing with seed banks.
(B) Providing practical knowledge.
(C) Packaging seeds for research.
(D) Responding to population growth.
答案:登入後查看
統計: A(2), B(4), C(1), D(1), E(0) #2586261
統計: A(2), B(4), C(1), D(1), E(0) #2586261