34. Which elements are most often the limiting nutrients for plant growth?
(A) nitrogen, oxygen, hydrogen
(B) carbon, sodium, chlorine
(C) nitrogen, potassium, phosphorus
(D) carbon, nitrogen, oxygen
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統計: A(1), B(0), C(3), D(1), E(0) #3411518
統計: A(1), B(0), C(3), D(1), E(0) #3411518