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问题 单项选择题

结构化分析(SA) 方法是一种

A．自顶向下逐层分解的分析方法

B．自底向上逐层分解的分析方法

C．面向对象的分析方法

D．以上都不对

答案

参考答案：A

解析： 结构化分析(SA)方法是一种自顶向下逐层分解的分析方法。

填空题

用适当的介词填空

1. Sandy is wearing a cat's costume. Does she look ________ a cat?

2. Why don't you give the child a candle ________ a treat?

3. All the children are wearing special costumes ________ masks.

4. Jean's birthday party will start ________ 7:00 ________ the evening.

5. — When were you born? 

    — ________ 1993.

6. Uncle Liu often takes his dog ________ a walk after supper.

7. Children can get lots of money ________ Chinese New Year.

8. We'll leave for Shanghai ________ the morning of October 5th.

9. Simon began to go to school ________ seven.

10. Now they are ________ holiday in Huangshan.
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单项选择题

进程调度有各种各样的算法，如果算法选择不当，就会出现什么现象

A．颠簸(抖动)

B．进程长期等待

C．死锁

D．异常
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