Question

giúp tớ với

Answer 1

câu B đó

Answer 2

D

Answer 3

b

Answer 4

Tham khảo!

https://khoahoc.vietjack.com/question/49494/%EF%BB%BFkhai-hoang-lan-bien-nham-muc-dich-gi-tang-san-luong-nong-san