发布日期:2010-06-16 09:47:59
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区别下列各组物质,括号内所选用的试剂或实验用品错误的是 A. 氧气和空气(带火星的木条) B. CO2和CO(澄清的石灰水) C. 汽油和酒精(水) D. NaCl溶液和NaOH溶液(稀HCl) |