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A￡?KCl?￠HCl?￠CO2
B￡?Ba(OH)2?￠CH3COOH?￠NH3?¤H2O
C￡?NaHCO3?￠BaSO4?￠HNO3
D￡?H2SO4?￠Fe(OH)3?￠H2O 91ExAM.org
????ìa ??áD?÷×é???ê??ê?óú??μ??a?êμ?ê?
A￡?KCl?￠HCl?￠CO2
B￡?Ba(OH)2?￠CH3COOH?￠NH3?¤H2O
C￡?NaHCO3?￠BaSO4?￠HNO3
D￡?H2SO4?￠Fe(OH)3?￠H2O
±?ìa′e°?￡oC
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ê?ìa·???￡o?t???ˉì??a·?μ??a?ê￡?A′í?ó￡??a???ˉ±μ?a??μ??a?ê￡?′×?áoí°±???aè?μ??a?ê￡?B′í?ó ￡?C?ù?a??μ??a?ê￡??a???ˉìúoí???aè?μ??a?ê￡?D′í?ó￡?′e°???C￡?
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History repeats itself. 历史往往重演。 
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