40. According to this article, what nutrients can the grass-eating animals get from the grasses of the plains?
(A) proteins
(B) water
(C) carbohydrates
(D) vitamins
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統計: A(576), B(152), C(86), D(61), E(0) #3329190
統計: A(576), B(152), C(86), D(61), E(0) #3329190