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  3. Difference in position adopted by oxygen and hydrogen atoms account for variations in the crystalline structure of different for

Difference in position adopted by oxygen and hydrogen atoms account for variations in the crystalline structure of different for

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问题 Difference in position 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 form
D、constitute
答案B
解析  画线词account for的意思相当于B．explain，即“可以解释为。”该句的题意为：氧原子和氢原子所处位置的不同是不同形式冰块晶体结构多样化的主要原因。故正确答案为B。辨义：A．are caused by由……引起；C．derive form由……产生；D．constitute构成。
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