______是DBMS的基本单位，它是用户定义的一组逻辑一致的程序序列

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问题单项选择题

______是DBMS的基本单位，它是用户定义的一组逻辑一致的程序序列。

A．程序

B．命令

C．事务

D．文件

答案

参考答案：C

选择题

( ) 1. It's six o'clock in the afternoon. It's time to ___________.	A.
( ) 2. It's nine in the morning. It's time to ___________.	B.
( ) 3. It's 10: 00 in the evening. It's time to ___________.	C.
( ) 4. School is over. It's time to ___________.	D.

填空题

《青门饮》：“醉里秋波，梦中朝雨，都是醒时烦恼。”的作者是（）。