问题 单项选择题

BSP划分子系统的原则有几条,下列哪个不属于划分原则

A.一个过程只能有一个子系统支持

B.原系统不影响新系统边界

C.由一个过程组成

D.子系统有合理边界

答案

参考答案:A

解析:BSP划分子系统的原则:  ①过程提供了合理的子系统边界。  ②子系统通常仅由一个过程组成。  ③一个过程可以由两个或多个子系统来支持。  ④已有的应用系统不应对新系统的规模和边界产生影响。

阅读理解

阅读理解。

     A Lady was very afraid of nice (老鼠).  One day she saw a mouse running across her kitchen floor.  

 So she was angry and ran out of the house, got on a bus and went down to the shops.  There she bought

 a mouse-trap (老鼠夹). The shopkeeper (售货员) said to her, "Put some cheese in it, and you will soon

 catch that mouse.  "

     The lady went home with her mouse-trap ,but when she looked in her cupboard (橱柜), she could not

  find any cheese in it.  She did not want to go back to the shops, because it was very late, so she cut a

 picture of some cheese out of a magazine and put that in the trap.  Surprisingly (令人惊讶地), the picture

  of the cheese was quite successful! When the lady came into the kitchen the next morning, there was a

 picture of a mouse in the trap beside the picture of the cheese!

1. The lady got on the bus to.

    A. buy a mouse-trap  

    B.  buy some cheese

    C.  buy some pictures  

     D.  buy some magazines

2. The shopkeeper asked her to putin the mouse-trap.

    A. pictures  

    B. magazines  

    C. cheese

    D. nothing

3. The lady put the picture of the cheese in the mouse-trap because.

    A. she thought it would be quite successful

    B. it would be surprising

    C. she didn't want to go back to the shops to buy cheese

    D. she was afraid of mice

4. The next morning, when the lady came into the kitchen, shein the mouse-trap.

    A. saw a mouse  

    B. caught a mouse

    C. saw a picture  

    D. saw a magazine

单项选择题