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外语
A. reactive B. lightest C. important D. complete E. flammable F. unnecessary Noble gases are not very chemically______.
A. reactive B. lightest C. important D. complete E. flammable F. unnecessary Noble gases are not very chemically______.
admin
2012-12-28
37
问题
A. reactive
B. lightest
C. important
D. complete
E. flammable
F. unnecessary
Noble gases are not very chemically______.
选项
答案
A
解析
句意:惰性气体化学反应不是非常——。全篇都可看出,惰性气体之所以叫惰性,是因为没有积极的化学反应。因此A为正确选项。
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