问题 填空题

在数据库的三级模式体系结构中,外模式与模式之间的映像(外模式/模式),实现了数据库的 【10】 独立性。

答案

参考答案:逻辑

解析:[评析] 数据库系统的三级模式是对数据的三个抽象级别。为了能够在内部实现这3个抽象层次之间的联系和转换,数据库管理系统在这三级模式之间提供了两层映像:外模式/模式映像和模式/内模式映像。正是这两层映像保证了数据库系统中的数据能够具有较高的逻辑独立和物理独立性。

阅读理解

Have you ever lost your temper? Did you yell or scream at those around you, even people you like or love? Did you want to break something or hit someone?

Everyone gets angry. We have lots of emotions. At different times, we may be happy, sad or jealous.    小题1:  .

It’s perfectly okay to be angry at time(偶尔)--- in fact, it’s important to get angry sometimes. Anger can even be a good thing. When we are treated unfairly, anger can help us stand up for ourselves.

__小题2:___ some people keep their anger buried deep inside. If you do this, you might get a headache or your stomach might start to hurt. You may just feel crummy (糟糕的) about yourself or start to cry. It’s not good to hide your anger, so you should find a way to let it out without hurting yourself or others.

When you start to feel angry, you can count to 10, draw a picture of anger, play a video game, run as fast as you can or do something active. An effective way is to talk to a friend you can trust.   小题3:  .

小题4:  Instead, admit to yourself that you are angry and try to figure out why you are angry and what you can do to keep the situation from happening again.

Never getting angry is impossible. But, you should always remember that how you act when you’re angry can make the situation better or worse.  

小题5: Take charge of it!

A. Once you talk about anger, those bad feelings usually start to go away.

B. Taking it out on others never solves anything.

C. Anger is just another way we feel.

D. Here is an important way to deal with anger.E.  But anger must be released in the right way.

F.  Every coin has two sides.

G.  Don’t let anger be the boss of you.

填空题