A. A type of wild vegetation
B. Western migration after Civil War
C. The raising of cattle
D. The climate of the Western United States
Đáp án là A. Một loại thực vật hoang dã: in the dry grazing lands of the West that familiar blue joint grass was often killed by drought.. Who could imagine a fairy-tale grass that required no rain and somehow made it possible for cattle to feed themselves all winter? But the surprising western wild grasses did just that.
Câu hỏi trên thuộc đề trắc nghiệm dưới đây !
Copyright © 2021 HOCTAP247