【简答题】My daughter used to play with the dog by taking a(n) of its hair and then spending a long time rubbing, combing and twisting it.
【单选题】作用在变形体上的平衡力系,若作用在刚体上,则刚体
【单选题】My daughter used to play with the dog by taking a(n) of its hair and then spending a long time rubbing, combing and twisting it.
【单选题】My daughter used to play with the dog by taking a _____ of its hair and then spending a long time rubbing,combing and twisting it.
【单选题】作用在变形体上的平衡力系,若作用在刚体上,则刚体 。
【单选题】作用在变形体上的平衡力系,若作用在刚体上,则刚体
【单选题】My daughter used to play with the dog by taking a(n) ___ of its hair and then spending a long time rubbing, combing and twisting it.
【简答题】My daughter used to play with the dog by taking a(n)____ fo its hair and then spending a long time rubbing, combing and twisting it.