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2018年中考化学真题分类汇编3化学实验与探究考点16常用的化学实验技能6常见气体的制备和收集4多功能瓶（无答案）.doc

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2018年中考化学真题分类汇编3化学实验与探究考点16常用的化学实验技能6常见气体的制备和收集4多功能瓶（无答案）.doc_第1页
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1常用的化学实验技能（18 湖州）13.下图所示的装置有很多用途，下列使用方法不正确的是A.排水法收集氧气时，由 a 口进气B.排空气法收集氢气时，由 b 口进气C.排水法收集氢气时，由 b 口进气D.排空气法收集二氧化碳时，由 a 口进气

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