【判断题】在机械图样中同一图样上允许选用二种不同形式的字体。
【单选题】用来测量交流电流(如国产T301)的钳形表是由电流互感噐和( )组成的。
【简答题】The French pianist who had been praised very highly ________ to be a great disappointment. A) turned up B) turned in C) turned out D) turned down
【单选题】对于危险性化学试剂的保管,错误的是( )
【单选题】在同一图样上允许选用( )种型式的字体。