下列哪种元素是人工合成元素（）
下列哪种元素是人工合成元素（）
A.Lv
B.Tc
C.Sr
D.Cd
E.Mn
F.Cr
G.Zn
正确答案：Lv；Tc
Tag：化学与社会 元素
时间：2022-01-20 14:27:39
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