【单选题】在电动机电气控制线路的线路保护环节中,( )起短路保护作用。
【简答题】What was she doing ?
【判断题】补偿绳排列整齐,不得相互缠绕,防止绳股之间交错重叠;允许有接头及轻微的松股、断股。( )
【单选题】— What was she doing when you visited her? .— She was _____ herself in the mirror.
【简答题】下面程序段的执行结果是 int a,b,c,t; a=1; b=2; c=2; while(a { t=a; a=b; b=t; c--; } printf("%d,%d,%d", a, b, c);