题目内容

读出了“脏”数据是因为事务的（）遭到了破坏。

A. 原子性
B. 一致性
C. 隔离性
D. 持久性

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可以防止丢失修改和读“脏”数据的是（）。

A. 一级封锁协议
B. 二级封锁协议
C. 三级封锁协议
D. 两段锁协议

Fill in the blank with the expression given below. Change the form where necessary. Each expression can be used only once.1. I _______ a letter of complaint to the manager of the store as complaint to the manager of the store as soon as I found they had sold me a pair of mismatched shoes

Fill in the blank with the expression given below. Change the form where necessary. Each expression can be used only once.2. People browse the Internet, read newsapers and watch TV to _____ what is happening in the world.

Fill in the blank with the expression given below. Change the form where necessary. Each expression can be used only once.3. The university has _____ another large laboratory for students to design more complicated robots.