A.A condition that interferes with a person's ability to sleep normally. B.Stopping breathing for short periods. C.Difficulty in either falling asleep or staying asleep. D.Sudden attacks of deep sleep.
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【判断题】设ZnCl2水溶液的质量摩尔浓度为b,离子平均活度因子(系数)为γ±,则其离子平均活度 a±=γ± b /bθ。是不是?