在定义系统总体结构的过程中，要用表达数据对系统所支持的过程之间的关系的图来定义出信息

单位开会总有人迟到，怎么办

阅读理解。

     Most friendships die a natural death: people move, change jobs, or start different stages of life. Other

friendships, however, end unexpectedly. When a friendship is over and you don't understand why, it can

be especially painful. Sometimes a friend ends your relationship without telling you why.

     The loss of friendship might be worth reflecting on. Knowing when a friendship is over and why it ends

may help you build stronger friendships in the future. 

     ● See if you can find a problem. When a friendship is over, examine your relationship. Perhaps you

remember your friend complaining that you're always late. Maybe you seldom return your friends' phone

calls. When afriend ends your relationship, try to find out the reasons why the friendship is over. 

      ● Write a letter to your friend. Express your feeling about the friendship. Do you miss seeing them?

Do you have any regrets (遗憾)? Would you act differently if you were still friends? Make it an honest

communication(交流)． 

      ● Express your feelings of hurt or anger. Write or talk about how you feel in a letter. When a friendship

is over, it's important to communicate exactly how hurt you feel,and why. Write until you have nothing left

to say. When a friend ends your relationship, you do have the right to express yourself. 

      ● Communicate that you are open to picking up the friendship. When afriendship is over and you

want to reconnect (再接合) some day, send Christmas, or birthday cards. Say hi and send greetings through

mutual (共有的) friends. When a friendship is over, don't give up until you're ready. 

      ● Decide to make your present friendsbips better. An adviser once told me that simply talking about

your relationship strengthens your relationship. Talk to your present friends. Are they happy with your

friendship? If a friend ends your relationship, learn something from it.

1. The underlined phrase "reflecting on" in Paragraph 2 is closest in meaning to _____. [ ]

A. thinking about

B. giving up

C. keeping on

D. getting angry

2. In which situation do you probably feel painful most when afriendship ends? [ ]

A. Your friend doesn't work with you any longer.

B. Your friend goes to another place to live.

C. Your friend leaves for further study in another country.

D. Your friend suddenly refuses to speak to you or even meet you.

3. What can we know from "See if you can find a problem"? [ ]

A. You are always late when you and your friend plan to go out.

B. You often refuse to answer your friends' phone calls.

C. Your friend is fond of complaining all the time.

D. Perhaps your friendship is over because of your problem.

4. When afriendship is over,we may do all the following EXCEPT _____. [ ]

A. write a letter to your friend to tell your regrets

B. talk about how you feel about your friendship

C. ask your friend whose fault on earth it is

D. send your greetings to your friend before giving up

最适合用于免疫电镜观察（）。

A.超薄切片

B.冷冻切片法

C.震动切片

D.火棉胶切片法

E.石蜡切片法

有些滤镜效果可能占用大量内存，特别是应用于高分辩率的图像时，以下哪些方法可提高工作效率？（）

A.先在一小部分图像上试验滤镜和设置

B.如果图像很大，且有内存不足的问题时，可将效果应用于单个通道（例如应用于每个RGB通道）

C.在运行滤镜之前先使用“清除”命令释放内存

D.将更多的内存分配给Photoshop，如果需要，可将其它应用程序中退出，以便为Photoshop提供更多的可用内存

E.尽可能多的使用暂存盘和虚似内存

地下室的墙体采用砖墙时，厚度不宜小于（）mm。

A.120

B.200

C.240

D.370