2. 外语
  3. A. reactive B. lightest C. important D. complete E. flammable F. unnecessary Among the elements of noble gases Helium is the___

A. reactive B. lightest C. important D. complete E. flammable F. unnecessary Among the elements of noble gases Helium is the___

admin2012-12-28  52
问题 A. reactive
B. lightest
C. important
D. complete
E. flammable
F. unnecessary
Among the elements of noble gases Helium is the______.
选项
答案B
解析 句意：惰性气体中的氮气 。根据第三段最后一句话可知，氦气是最轻的。故选B。
转载请注明原文地址:https://kaotiyun.com/show/SlLd777K
本试题收录于： 职称英语理工类A级题库职称英语分类
0

职称英语理工类A级

职称英语

相关试题推荐
随机试题
最新回复(0)