考博考试

【单选题】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
网考网参考答案：B
网考网解析：
are caused by由……引起；explain解释；derive from源自；constitute制订，组成；account for解释。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>