【单选题】( )电动机是一种能将电(数字)脉冲信号输入转换成物体的旋转增量运动(或机械角位移)的电磁执行元件。
【单选题】Carl: How long __________________________ there?
【单选题】Carl Weeks is a 55 years old man who had hypertension, his height 176cm, and his weight 86kg. Carl Weeks belongs to ( )
【单选题】How soon will Bob get recovered?