要求确认自己和对方当事人某种法律关系存在或不存在的请求之诉为（）.
A.变更之诉
B.确认之诉
C.给付之诉
D.复议之诉
参考答案：B
There was a time ______ women had no right to vote, could not go to university or choose their jobs.[ ]
A. what
B. which
C. when
D. that
以下是冯·诺依曼体系结构计算机的基本思想之一的是
A．计算精度高
B．存储程序控制
C．处理速度快
D．可靠性高
