问题 填空题

在结构化分析使用的数据流图(DFD) 中,利用______对其中的图形元素进行确切解释。

答案

参考答案:数据字典

解析: 数据字典(Data Dictionary,DD) 用来定义数据流图中各个成分的具体含义。数据字典的任务是将数据流图中出现的所有被命名的图形元素作为一个词条加以定义,使得每一个图形元素的名字都有一个确切的解释。

阅读理解

阅读理解。

     Let children learn to judge their own work. A child learning to talk does not learn by being corrected all the

time: if corrected too much, he will stop talking. He notices a thousand times a day the difference between the

language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make

his language like other people's. In the same way, children learning to do all the other things: they learn to do

without being taught to walk, run, climb, whistle, ride a bicycle, compare their own performances with those

of more skilled people, and slowly make the needed changes. But in school we never give a child a chance to

find out his mistakes and correct them for himself. We do it all for him. We act as if we thought that he would

never notice a mistake unless it was pointed out to him, or correct it unless he was made to. Let him work out,

with the help of other children if he wants it, what this word says, what the answer is to that problem, whether

this is a good way of saying or doing this or not.

     If it is a matter of right answer, as it may be in mathematics or science, give him the answer book. Let him

correct his own papers. Why should we teachers waste time on such routine work? Our job should be to help

the child when he tells us that he can't find the way to get the right answer. Let the children learn what all

educated persons must some day learn, how to measure their own understanding, and how to know what they

know or do not know.

1. According to the passage, the best way for children to learn things is by _____. [ ]

A. listening to skilled people's advice

B. asking older people many questions

C. making mistakes and having them corrected

D. doing what other people do

2. Which of the following does the writer think teachers should NOT do? [ ]

A. Give children correct answers.

B. Allow children to make mistakes.

C. Point out children's mistakes to them.

D. Let children mark their own work.

3. According to the writer, teachers in school should _____. [ ]

A. allow children to learn from each other

B. point out children's mistakes whenever found

C. give children more book knowledge

D. correct children's mistakes as soon as possible

4. The passage suggests that learning to speak and learning to ride a bicycle are _____.[ ]

A. different from learning other skills

B. the same as learning skills

C. more important than other skills

D. not really important skills

单项选择题 B1型题