问题 单项选择题

数据库恢复的基础是利用转储的冗余数据,这些转储的冗余数据包是指______。

A.数据字典、应用程序、审计档案、数据库后援副本

B.数据字典、应用程序、日志文件、审计档案

C.日志文件、数据库后援副本

D.数据字典、应用程序、数据库后援副本

答案

参考答案:C

解析: 数据库恢复的实现技术主要是建立冗余并利用冗余数据实施数据库恢复,建立冗余最常见的技术是数据转储和登录日志文件。

改错题

第二卷(两部分,共35分)

第四部分:写作(共三节,满35分)

第一节:短文改错(共10小题;每小题0.5分,满分5分)

此题要求改正所给短文中的错误,对标有题号的每一行作出判断:

如无错误,在该行右边横线上画一个勾(\/ );如有错误(每行只有一个错误),则按下列情况处理:

该行多一个词:把多余的词用斜线(\)划掉,在该行右边横线上写出该词,并也用斜线划掉。

该行缺一个词:在缺词处加一个漏字符号(^),在该行右边横线上写出该加的词。

该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。

注意:原行没有错的不要改。

My swimming experience has been very interested.                 76. __________

There was a time when I swam like a rock. This went on to              77. __________

one day when I was fishing with a friend at nearby river.                78. __________

I fell into it. If my friend had not come to his rescue,                   79. __________

I would have been drowned. Ever since then, I have come               80. __________

to know the importances of learning to swim. I didn’t                    81. __________

take any training class but learned it all on myself.                         82. __________

However, I have no difficulty swim at all now. Though my              83. __________

self-invented style looked awkward, at least it can keep                 84. __________

me float. Thinking of this, I am more than satisfied.                    85. __________

单项选择题