【判断题】A symbol means using concrete objects to represent abstract ideas.
【单选题】以下不属于数据库阶段和文件阶段本质区别的是
【单选题】听力原文: The hand has been a symbol through the ages and in many cultures. There are hundreds of expressions and combinations of words using hand in the English language. Let Us examine some of the expre...
D.
to take over the business
【单选题】细胞受刺激而兴奋时,膜内电位负值减小称为
【单选题】价值工程的核心和所采用的成本分别是产品的( )。
【判断题】A symbol means using concrete objects to represent abstract ideas.