改进数据流图DFD的目的是提高它的正确性和易理解性。分析人员可以以数据-我要搜题网

[不定项选择题]共用题干第三篇

The Iceman

On a September day in 1991,two Germans were climbing the mountains between Austria and Italy. High
up on a mountain pass,they found the body of a man lying on the ice.At that height(10,499 feet or 3,200
meters),the ice is usually permanent,but 1991 had been an especially warm year. The mountain ice had
melted more than usual and so the body had come to the surface.
It was lying face downward. The skeleton（骨架）was in perfect condition, except for a wound in the
head.There was still skin on the bones and the remains of some clothes.The hands were still holding the
wooden handle of an ax and on the feet there were very simple leather and cloth boots.Nearby was a pair of
gloves made of tree bark（树皮）and a holder for arrows.
Who was this man?How and when had he died?Everybody had a different answer to these questions.
Some people thought that it was from this century,perhaps the body of a soldier who died in World War I,
since several soldiers had already been found in the area. A Swiss woman believed it might be her father,
who had died in those mountains twenty years before and whose body had never been found.The scientists
who rushed to look at the body thought it was probably much older,maybe even a thousand years old.
With modern dating techniques,the scientists soon learned that the iceman was about 5,300 years old.
Born in about 3300 B. C.,he lived during the Bronze Age in Europe.At first scientists thought he was probably
a hunter who had died in an accident in the high mountains.More recent evidence,however,tells a different
story.A new kind of X-ray shows an arrowhead still stuck in his shoulder. It left only a tiny hole in his skin,
but it caused internal damage and bleeding. He almost certainly died from this wound, and not from the
wound on the back of his head.This means that he was probably in some kind of a battle.It might have been
part of a larger war,or he might have beenl fighting bandits.He might even have been a bandit himself.
By studying his clothes and tools,scientists have already learned a great deal from the iceman about the
times he lived in.we may never know the full story of how he died,but he has given us important clues to the
history of those distant times. The body of the iceman was found in the mountains mainly because__________.
A.two Germans were climbing mountains
B.he was just on a mountain pass
C.the melted ice made him visible
D.he was lying on the ice

[单项选择]改进数据流图DFD的目的是提高它的正确性和易理解性。分析人员可以以数据守恒和( )方向检查数据流图的正确性。A. 文件操作B. 程序框图C. 软件结构D. 流程描述

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[单项选择]改进数据流图DFD的目的是提高它的正确性和易理解性。分析人员可以以数据守恒和( )方向检查数据流图的正确性。
A. 文件操作
B. 程序框图
C. 软件结构
D. 流程描述