【单选题】急性化脓性腹膜炎的手术指征中, 错误 的是
【单选题】He was ______ when he heard the unexpected news, but I finally convinced him.
【单选题】Although the arguments were ____, he was not convinced.
【单选题】下列选项( )不是可编程序控制器的抗干扰措施
【单选题】目前在切削加工中最常用的刀具材料是( )
【单选题】下列选项 ( )不是可编程序控制器的抗干扰措施