My name is Lucy Smith.Lucy is my first name.Smith is my last name.I’m 13.My favorite color is purple.I’m in No.1 Middle School.I’m in Class2,Grade 7.

Kathy is my friend.She is 12.Her favorite color is blue.She is in my class,too.She is a good girl.Her telephone number is 828-6785.

Mr. Black is my English teacher.He is English.I often(经常) ask him for help.I often call him at 843-0018.Helen is his daughter.She is in China now.Her favorite color is red.Kathy and I are her friends.We all like her.

小题1:Kathy is Lucy’s ______.

A．sister

B．brother

C．friend

D．cousin小题2:Kathy is in ______.

A．Class1,Grade7

B．Class2,Grade7

C．Class1,Grade2

D．Class2,Grade1小题3:What’s Helen’s favorite color?

A．Red.

B．Blue.

C．Red and blue.

D．Purple.小题4:Which sentence is right (正确)？

A．Lucy is 12.

B．Mr. Black is an English teacher.

C．Kathy is Mr. Black’s daughter.

D．Helen is not in China now.

设有员工关系Emp(员工号，姓名，性别，部门，家庭住址)，其中，属性“性别”的取值只能为M或F；属性“部门”是关系Dept的主键。要求可访问“家庭住址”的某个成分，如邮编、省、市、街道以及门牌号。关系Emp的主键和外键分别是（）。“家庭住址”是一个（）属性。

创建Emp关系的SQL语句如下：

CREATE TABLE Emp(

员工号CHAR(4)

姓名CHAR(10)

性别JCHAR(1)（），

门CHAR(4)（），

家庭住址CHAR(30)

PRINARY KEY (员工号) )；

“家庭住址”是一个（）属性。

A．简单

B．复合

C．多值

D．派生