在数据库逻辑结构设计中，将E-R模型转换为关系模型应遵循相应原则。对于三个不同实体集

阅读理解

       Mr. Wang is our English teacher. He is fifty years old. He has a big nose(鼻子) and small eyes. He

has glasses(眼镜). He often wears(穿着)a  blue jacket and black pants. He is strict (严格的) at his work, but he is good. He teaches English well. We think English is very interesting. We like him very much, too.

1. How old is Mr. Wang?

A. 50

B. 45

C. 15

2. Mr. Wang has __________ eyes.

A. old

B. big

C. small

3. What does he often wear?

A. a watch

B. black pants

C. a hat

4. What color is his jacket?

A. black

B. green

C. blue

5. The students ___________ Mr. Wang.

A. like

B. doesn't like

C. teaches English

旅游收入的初次分配是旅游企业对扣除（）补偿价值后的收入部分进行的分配。

A.物质资料

B.生活资料

C.资本性投入

D.经营费用

社会主义现代化建设时期，我党领导建立的最广泛的统一战线是 [ ]

A．革命统一战线

B．抗日民族统一战线

C．人民民主统一战线

D．爱国统一战线

怎样正确使用干粉灭火器？

港作拖轮顶推协助大船进行靠离泊操纵时，其最常用的系缆方式为：（）.

A.单首缆

B.双首缆

C.单首缆和双首缆

D.紧绑