問題詳情

8. Which of the following metals are essential?
(A)Cadmium, Aluminum, Nickel；
(B)Copper, Zinc, Iron
(C)Indium, Gallium, Uranium
(D)Molybdenum, Manganese, Boron

參考答案

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增