A. When they fail to make compromises in disputes. B. When they need time to rest C. When they would like to recall good times D. When they have a dispute
A. 自由电子 B. 正离子 C. 负离子
A. 极化 B. 电导 C. 损耗
A. 亲水 B. 憎水
A. 电子 B. 正离子 C. 负离子
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