对象关系数据库中，员工(工号，姓名，性别，联系电话)表中的联系

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问题单项选择题

对象关系数据库中，员工(工号，姓名，性别，联系电话)表中的联系电话为多值属性，则员工属于 (62) ，在SQL99标准中可以使用 (63) 来实现。

A．非1NF关系
B．1NF关系
C．2NF关系
D．3NF关系

答案

参考答案：A

单项选择题

正常人脑脊液中糖的最低含量为

A．4.0mmol/L

B．3.5mmol/L

C．3.0mmol/L

D．2.5mmol/L

E．2.0mmol/L

填空题

用括号里的词的适当形式填空。

1. He ____________ (watch) TV at nine last night.

2. Lucy ____________(clean) the house since she came back home.

3. Jane ____________ (study) Chinese these months, for she plans to visit China.

4. When I went into the classroom. I saw her ____________ (write) on the blackboard.

5. Helen comes from France, she is a ____________(欧洲人).

6. Li Lei said he ____________ (想念)his parents very much.

7. Miss Zhou is very popular in our school, she is a ____________ (成功)teacher.