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【简答题】
2012年6月,贵州省某煤矿发生了一起严重的瓦斯爆炸事故,造成了几十人死亡,经专家分析,在事故发生的同时,从煤矿喷出了一种有毒的气体硫化氢.在通常情况下,硫化氢是一种无色,具有臭鸡蛋气味的气体,密度比空气大,易溶于水;能在空气中燃烧生成水和二氧化硫气体.根据以上信息回答. (1)写出硫化氢的两点物理性质:______、______. (2)写出硫化氢的一条化学性质______;写出硫化氢在空气中燃烧的文字表:______. (3)据报道,人员伤亡过多的原因之一是缺乏自救防御常识.你认为下列自救措施合理的是______(填序号)这样做的理由是______(答一条) A.逃生地势高处逆风跑 B.逃生地势低处顺风跑 C.立即用浸过水的毛巾捂住口鼻 (4)若在实验室制取硫化氢气体,收集方法是______.
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A.
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B.
变式
C.
正例与反例
D.
概括
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【简答题】keep up with set up account for stand out 12. The university has _______ another large laboratory for students to design more complicated robots.
【简答题】response transform focus yze estimate competitive compensate adopt typical regulate keep up with set up fire off take the lead add to stand out ...
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