异或门的逻辑关系的特点是什么？
参考答案：
当两个输入端彼此不一致时，输出端才为高电平，只要两个输入端一致，输出就为低电平。
Which of the following statements is (are) true ( ) Ⅰ. The number of cyclic subgroups of the additive group of integers is infinite Ⅱ. The number of cyclic subgroups of the additive group of real numbers is infinite
A．Ⅰ and Ⅱ
B．Ⅰ only
C．Ⅱ only
D．neither Questions 43、44 refer to the space requirements of different methods of storing graph The Choices for these questions are combinations of the following statement Ⅰ. The space required depends on the number of vertices Ⅱ. The space required depends on the number of edges
中年消费者购买行为的一般心理特征有哪些？
