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【单选题】
下列有关化学用语表示正确的是( )
A.
氮气的电子式为 · ( · ) N · ( · ) · ( · ) · ( · ) N · ( · )
B.
重水的化学式为 1 ( 2 ) H 2 O( 或 D 2 O)
C.
用电子式表示氯化钠的形成过程:
D.
N 2 H 4 的结构式
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