【判断题】实二次型的标准形不唯一,但是规范形是唯一的.
【判断题】实数域上每一个二次型的规范形都是唯一的。
【单选题】Brian has to get up early to catch the first bus tomorrow. Please .
【单选题】Bob fell asleep in class and the teacher . [ ]
【单选题】Linda asked her mother______ at seven o'clock. [ ]
【判断题】梁上部通长钢筋的搭接位置为跨中净跨的三分之一