题目: 对于同一系统的状态变量和状态空间描述具有()A.状态变量具有唯一性,状态空间描述具有非唯一性B.状态变量具有非唯一性,状态空间描述具有唯一性C.状态变量具有非唯一性,状态空间描述也具有非唯一性D.状态变量具有唯一性,状态空间描述也具有唯一性 答案: 参考答案:C
题型:选择题 Not only _______interested in football but ______beginning to show an interest in it.A.the teacher himself is; all his students areB.the teacher himself is; are all his studentsC.is the teacher himself ; are all his studentsD.is the teacher himself; all his students are 查看答案