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 □ 我认为14题的A、B是相对应的,为何选B不选A?ymz <5-12 9:8>
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 □ 楼上提出的14题我建议大家讨论一下,我认B也是错的,比如在CH3COONa溶液中,由于部分氢离子变成了醋酸,部溶液中水电离出的氢离子浓度小于107,也就是a7,所以其也可以是促进水的电离造成的yirongbu <5-10 12:45>
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 □ 2007年广州二模化学试题与今年广东的化学科考试说明比较吻合,但遗憾的是参考答案中有三处错误,其中14题B改为C 17题AD改为A18题AB改为B16888 <4-30 18:35>
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