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问题 单项选择题

结构化程序设计所规定的三种基本控制结构是

A．输入、处理、输出

B．树形、网形、环形

C．顺序、选择、循环

D．主程序、子程序、函数

答案

参考答案：C

解析： 顺序结构、选择结构和循环结构(或重复结构)是结构化程序设计的3种基本结构。选项C正确。

补全对话，情景问答

补全对话。

Nick: Have you ever been an April fool, Dave?

Dave: Yes, I have.  A friend once    1     .When I got there I found that he had fooled me. It wasn't a costume party. I was the only person wearing a costume.    2   . How about you, Nick?

Nick: Well,last April Fools Day, when my     3    , I got up, took a shower, got

dressed, and went to school. But when I got there,      4     , I was the only one there. After an hour, the other kids   5    , and I realized that my brother had fooled me.

Dave: He had?

Nick: Yes. He had changed the clock to an hour earlier.

1.                                                                

2.                                                          

3.                                                          

4.                                                          

5.                                                          
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