2021-2022学年九年级上册化学人教版基本概念单元小练（二）我们周围的空气
※题型：单选题※知识点：单选题※试题难度：容易<br>化学课上,老师让同学们举一个“缓慢氧化”的例子,大家积极发言,有下列不同的答案<br>,其中不正确的一项是( )<br>A.铁丝生锈 B.食物的腐烂<br>C.酒和醋的酿造 D.蜡烛的燃烧<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/e87f23857a6744fcb8564a062a18e1ba/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/f3be3b0a8b55454f8d5c9c0cd6aae19c/0A227992C21DF4C2865BD4AF5A027875.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下图是表示气体粒子的示意图,其中“●”和“○”分别表示两种不同元素的原子,那么其中表示混合物的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/2/20/FC0FEBBCDD66F9CA17C78EE4E7EE67EE.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/2/20/614F55290D02E3E34127433CC00C6291.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/2/20/33225173DCBBB6D5CAC0DC56F230F63E.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/2/20/BFE85E86ED200A5175999257ECA4E985.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/d5412cab423044d0bb644b5221d1d561/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/1160a5f2269845f9bacee8c0fd9c1f9a/9A65BD2D9081F05491D9A3618C69362E.png"><br><br>
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