问题 填空题

数据流图的类型有 【4】 和事务型。

答案

参考答案:【4】变换型

解析:【解析】典型的数据流类型有两种:变换型和事务型。变换型是指信息沿输入通路进入系统,同时由外部形式变换成内部形式,进入系统的信息通过变换中心,经加工处理以后再沿输出通路变换成外部形式离开软件系统;在很多软件应用中,存在某种作业数据流,它可以引发一个或多个处理,这些处理能够完成该作业要求的功能,这种数据流就叫做事务。

阅读理解

Dick was born in a poor family. His father had a small boat and went fishing in the morning and sold the fish in the market in the afternoon. Then he bought some food for his family. When winter came, they were often hungry. One morning the hungry man fell into the river and wasn’t found. Dick’s mother left her three-year-old son without saying good-bye. His aunt had to look after him.

Twenty years passed. Dick became a tall, strong man. He found work on a farm. He worked hard and wanted to get more money. He often went to see his aunt with some nice presents. The woman was very happy but one day she died in a traffic accident. The young man was very sad. After he buried her, he decided to buy a beautiful tombstone(墓碑)for her. He went to town and came in a shop, but all the tombstones were too expensive. He asked, “Do you sell an old tombstone, sir?” “Yes, we do, sir, ” answered the shopkeeper. “Is it as expensive as the new one?”

“No, it’s much cheaper,” said the man. “But another name was engraved (刻) on it.” “It doesn’t matter, ” said Dick. “My aunt couldn’t read.”

小题1: If      , the family members were hungry.

A.Dick’s father could catch no fish in winter

B.Dick’s father had a boat in winter

C.Dick’s father had to look after him in winter

D.no food was sold in winter小题2:Dick wanted to get more money to     .

A.marry a wife

B.give his aunt nice presents

C.buy a farm

D.build a house小题3:Dick often went to see his aunt because       .

A.she felt lonely

B.she was often ill

C.she had no children

D.with her help he grew up小题4:Dick wanted to buy an old tombstone because     .

A.he didn’t had enough money to buy a new one

B.his aunt couldn’t read whose name was engraved

C.his aunt wasn’t going to mind it

D.nobody knew what his aunt’s name was

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