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【单选题】
电子云是指：A.
核外电子运动的一种固定状态
B.
波函数ψ
C.
核外电子概率密度分布的形象化表示
D.
是核外电子运动的固定轨道
E.
以上均不是
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A.
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B.
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C.
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D.
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A.
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B.
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C.
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D.
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A.
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B.
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C.
it
D.
this
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