A-A+
Differences in positions adopted by oxygen and
问题详情
Differences in positions adopted by oxygen and hydrogen atoms account for variations in the crystalline structure of different forms of ice.
A．are caused by
B．explain
C．derive from
D．constitute
参考答案
正确答案：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。
