问题 单项选择题

让用户对相同的数据创建不同的视图,这是下列()的功能。

A.操作系统

B.程序库管理系统

C.数据库管理系统

D.工具程序

答案

参考答案:C

解析:

数据库管理系统(DBMS)的功能就是让用户可以根据相同的数据表创建不同的视图。选项(a)不正确,操作系统对计算机系统有一定要求。选项(b)不正确,程序库管理系统主要是控制程序运行和向生产程序库输入或输出任务控制语句。选项(d)不正确,工具是为了完成一些特殊的功能(如排序、打印或复制)。

问答题
完形填空

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

To forgive is a virtue(美德), but no one has ever said it is easy. When someone has deeply hurt you, it can be extremely difficult to let go of your hate. However, forgiveness is possible, and it can be surprisingly beneficial to your physical and mental health. People who forgive show less sadness, anger and stress and more hopefulness, according to a recent research.

  小题1:   Try the following steps:

Calm yourself.    小题2:   You can take a couple of breaths and think of something that gives you pleasure: a beautiful scene in nature, or someone you love.

Don't wait for an apology. Many times the persons who hurt you do not intend to apologize. They may have wanted to hurt you or they just don't see things the same way.   小题3:  Keep in mind that forgiveness does not necessarily mean becoming friends again with the person who upset you.

Take the control away from your offender (冒犯者). Rethinking about your hurt gives power to the person who causes you pain. Instead of piling your sad feelings in your heart, learn to look for the love, beauty and kindness around you.

  小题4:   If you understand your offender, you may realize that he or she was acting out of unawareness, fear, and even love. You may want to write a letter to yourself from your offender's point of view.

Don't forget to forgive yourself.    小题5:   But it can rob you of your self-confidence if you don't do it.

A.Why should you forgive?

B.How should you start to forgive?

C.Recognize the benefits of forgiveness.

D.Try to see things from your offender's angle.E. For some people, forgiving themselves is the biggest challenge.

F. To make your anger die away, try a simple stress-management technique.

G. If you wait for people to apologize, you could be waiting an awfully long time.