公共安全，是指不特定的多数人的生命、健康、生产、工作、生活和公私财产的安全。 ( )
参考答案：对
The data shows _______ successful people have in common is ______ they have perseverance.[ ]
A. that what; that
B. that that; that
C. what that; what
D. all that; because
数据库系统的日志文件用于记录下述哪类内容
A．程序运行过程
B．数据查询操作
C．程序执行结果
D．数据更新操作
