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最佳答案:化学平衡;chemical equilibrium电解质溶液;electrolyte solution弱电解质溶液;weak electrolyte solut
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最佳答案:good可以用作名词,例如:do sb good=do good to sb(对某人有益).It is no good doing sth.做.是没有好处的.
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最佳答案:参考答案:1,have five days off2,get a five days off3,a continuous five-day off