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【单选题】

You issued the following command： ALTER DATABASE ENABLE BLOCK CHANGE TRACKING；  What will be the result of issuing this command？（）

A、 The block change tracking feature is enabled， and the information about the system change number is written in the change tracking file.

B、 The block change tracking feature is enabled， and the information about the log sequence number is written in the change tracking file.

C、 The block change tracking feature is enabled， and the information about the blocks that are changed since the last backup is written in the change tracking file.

D、 The block change tracking feature is enabled， and the information about the locations of the datafiles and the online redo log files are written in the change tracking file.

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第1题
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第2题
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第3题
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第4题
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第5题
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第6题
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第7题
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第8题
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第9题
[] You have a computer that runs Windows 7. The Windows Experience Index displays the subscores in the following table. You need to increase the Windows Experience Index base score.  What should you do? （）  You have a computer that runs Windows 7. The Windows Experience Index displays the subscores in the following table. You need to increase the Windows Experience Index base score.  What should you do? （） 

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第10题
[简答题] 根据写作要求，写出一篇作文。 Suppose you are Simon. You purchased a Sony digital camera from Amazon.com and found that there were scratches on the screen. You are writing to complain about it.

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