机组转速和接力器发生非周期性摆动主要是反馈系统存在非线性。
参考答案：对
31. George ___ the good chance to present his proposal to the director, and at last, it was adopted.
A．realized
B．seized
C．delivered
D．Released
下列数据结构中，属于非线性结构的是
A．循环队列
B．带链队列
C．二叉树
D．带链栈
