目前常见的数据库产品基本上可分为两种：基于（）模式的和基于客户、服务器模式的。
参考答案：文件操作
单句改错.
1. Can't eat in the classrooms. ( )
A B C D
2. Do morning exercises everyday. ( )
3. Don't it like this. Do it like that. ( )
4. Don't is afraid. The dogs are friendly. ( )
5. He don't have to go home now. ( )
在召开远程会议时，应首先考虑______
A．技术要求、保密要求B．省时、省力C．交通不便D．互动性强
