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  3. Differences in positions adopted by oxygen and hydrogen atoms account for variations in the crystalline structure of different f

Differences in positions adopted by oxygen and hydrogen atoms account for variations in the crystalline structure of different f

admin2010-02-21  68
问题 Differences in positions adopted by oxygen and hydrogen atoms account for variations in the crystalline structure of different forms of ice.
选项 A、are caused by
B、explain
C、derive from
D、constitute
答案B
解析 are caused by由……引起；explain解释；derive from源自；constitute制订，组成；account for解释。
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