【判断题】步进电机没有累计误差,广泛应用于各种开环控制
【简答题】w______ n. 证人;目击者; vt. 目击;证明;作证
【单选题】原发性开角型青光眼最早视野缺损发生在()
【简答题】n. 目击者,证人 v. 目睹,目击 w_
【单选题】How long can a fire water tank provides if fire occurs?
【简答题】When fire occurs, being calm is especially _ because panic worsens emergency.