【判断题】在电火花成形加工过程中当铜电极对钢,或钢电极对钢,工具电极的极性选“+”极性。( )
【简答题】A: I was watching a good movie when the phone ran. What should I have _______ (do)?B: You shuld have _________ (take) the call and _________ (tell) the person you'd call later.
【判断题】Tennyson is very enthusiastic about scientific discoveries in the nineteenth century ( )
【判断题】强制联想要注意避免联想的两个事物过于接近。