【单选题】He was so convinced that people were driven by ______ motives that he could not believe that anyone could be unselfish.
【单选题】He convinced me ______ the difficulty of the work.
【单选题】He was ______ when he heard the unexpected news, but I finally convinced him.
【单选题】目前在切削加工中最常用的刀具材料是( )
【判断题】(?)三视图中主视图反映了物体的长度和宽度。?
【单选题】下列选项 ( )不是可编程序控制器的抗干扰措施