下列关于的说法正确的是（

下列关于的说法正确的是（）

A．所有原子可能都在同一平面上 B．最多可能有9个碳原子在同一平面

C．有7个碳原子可能在同一直线 D．可能有5个碳原子在同一直线

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下列关于 的说法正确的是（

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下列关于的说法正确的是（