[多选]以下哪个选项属于数据模型()A.层次模型B.关系模型C.网状模型D.面向对象模型

A.选项型B型给出下面代码段 : public class Test1 { public static void Main(string args[]) { int m=Convert.ToInt32(C


B.属于数据f international competition are focusing attention on the need to create and keep good jobs, those fears will eventually give way to worries about the growing shortage of young workers. One unavoidabl


C.模型模型面向模型机械式转向系统的组成有哪三部分?


D.层次模芭蕾舞的基本手型叫什么手型?