题目内容：
C、Si为同一主族的元素，CO2和SiO：化学式相似，但结构和性质有很大不同。CO2中C与O原子间形成o键和a键，SiO：中Si与O原子间不形成上述z健。从原子半径大小的为原子间能形成，而S、O原子间不能形成上述 。
参考答案：
答案解析：
单选题：C、Si为同一主族的元素，CO2和SiO：化学式相似，但结构和性质有很大不同。CO2中C与O原子间形成o键和a键，SiO
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