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Nowadays 1 people are becoming interested in travelling on holiday. There are many 2 of travelling. 3 you can visit many exciting places and enjoy the special food there. 4 , you can make friends by travelling so that your social circle is5 . 6 , you get chance to experience different cultures that can7your understanding of the world. What's more , no matter how 8you are, there is always a lot for you to learn through travelling. The main reason why many people like travelling is that it can help 9 stress and 10 . For example, most people are likely to have a short trip on the weekend after days of hard work.

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1.星期一_____ 2. 星期二_____3.星期三 _____ 4.星期四______5.星期五 _____ 6.星期六_____7.星期日 _____ 8. 周,星期 ____9.周末 _____10. 装饰品 _____

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保护数据库,防止未经授权或不合法的使用造成的数据泄露、非法更改或破坏。这是指数据的( )。

数据库的( )是指数据的正确性和相容性。

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