【单选题】If he spends more time watching TV every day than he spends on his own personal development in a year, he might be____.
【简答题】数据库管理系统是数据库系统的核心,它的英文缩写是()。(大写表示)
【多选题】内螺纹牙顶所在的圆柱面直径为( ),牙顶( ),能触及,所以用( )绘制。
【单选题】He actively promoted the dissemination of ideas about scientific development
【单选题】无线大容量系统中,两相短路电流与三相短路电流之间关系为
【简答题】数据库系统的核心是______。(大写英文缩写)