问题
选择题
Nowhere in nature is aluminum found free,owing to its always with other elements,most
commonly with oxygen. [ ]
A.combined
B.being combined
C.combine
D.having combined
答案
答案：B
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Nowhere in nature is aluminum found free,owing to its always with other elements,most
commonly with oxygen. [ ]
A.combined
B.being combined
C.combine
D.having combined
答案：B