试题与答案

请用空气的各种成分的相关知识进行填空: (1)进行“南澳一号”考古发掘时,潜水员

题型:填空题

题目:

请用空气的各种成分的相关知识进行填空:

(1)进行“南澳一号”考古发掘时,潜水员需要携带氧气,氧气的作用是______.

(2)刚拧开碳酸饮料瓶盖的时候,会听到“嘶嘶”的声音,那是______气体正在向外冒出,若加热该碳酸饮料会发现有大量气体逸出,这说明______.

(3)______虽然几乎不与任何物质发生化学反应,但是也有很广泛的用途,如制造电光源等.

答案:

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参考答案:错

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