问题 单项选择题

在E-R图中,用来表示实体之间联系的图形是【 】。

A.矩形

B.椭圆形

C.菱形

D.平行四边形

答案

参考答案:C

解析:E-R模型可用E-R图来表示,它具有3个要素:①实体(型)用矩形框表示,框内为实体名称。②属性用椭圆型来表示,并用线与实体连接。属性较多时也可以将实体及其属性单独列表。③实体间的联系用菱形框表示。用线将菱形框与实体相连,并在线上标注联系的类型。

阅读理解

任务型阅读

       In cold weather, 45 Japanese war orphans(孤儿) visited China to thank their Chinese foster(抚养)

families.    

       The Japanese orphans were those who had been left behind by their parents after the eight-year

Japanese-Aggression War against China. Most of them are more than seventy years old. Chinese Premier Wen Jiabao met them in the Zhongnanhai compound tJll Nov. 11 and invited them to visit the former

residence (故居) and office of the late Premier Zhou Enlai. The thariksgiving gathering was organized to

express the war orphans' thanks to their foster families, but the visit was an emotional(激起感情的) one

because many of their foster narents had l)een deacl.    

       "We care about the living conditions(生活状况)of the orphans after they returned to Japan, and

Ibelieve that everybody will live a happy life through their own efforts and by support from the Japanese

government," said Wen.

       Wen said the war orphans would feel again the love given by their foster parents and the deep

friendship between the Chinese and Japanese people during their visit in China.

                                                           

1. The Japanese war orphans visited China to____their foster families.

2. Chinese Premier Wen Jiabao____  them in the Zhongnanhai compound on Nov. 11.

3. 'l'hese orphans were left by their____after the eight-year Japanese-Aggression War against China.

4. Premier Wen wished them to live d____ife in Japan.

5. rl'he war orphans felt again the love and the deep____ becween China and Japan.

单项选择题