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Questions 11 to 18 are based on the conversation you have just heard.

A. She is tired of teaching.
B. She was dismissed from her job.
C. She is changing her job.
D. The school is not hot.

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设无向图G=(P，L)，P=v1，v2，v3，v4，v5，v6，L=(v1，v2)，(v2，v2)，(v2，v4)， (v4，v5)，(v3，v4)，(v1，v3)，(v3，v1)。G中奇数度顶点的个数是（）。

A. 2
B. 3
C. 4
D. 5

An Enterprise Resource Planning (ERP) is built upon a commercial (34) that promises the seamless (35) of all the information flowing through the company -- financial, accounting, human resources, supply chain and customer information. In implementation, all ERP systems include several features. The system is installed on a typical database management system. It requires initial setup according to the organization’s process, but it may be (36) according to the organization’s unique process requirements through a tool set contained within the ERP applications. Using ERP, (37) can be prescribed to automate approval processes through established chains of commanD. One of the methods used to effect rapid implementation of the ERP system is to conduct concurrent (38) sessions during the early stages of ERP implementation. 36（）

A. functions
B. processes
C. information
D. workflows

设有员工实体Employee(员工号，姓名，性别，年龄，电话，家庭住址，家庭成员，关系，联系电话)。其中，“家庭住址”包括邮编、省、市、街道信息；“家庭成员，关系，联系电话”分别记录了员工亲属的姓名、与员工的关系以及联系电话，且一个员工允许有多个家庭成员。员工实体Employee的主键为 (1) ；该关系属于 (2) ；为使数据库模式设计更合理，对于员工关系模式Employee (3) 。 2（）

A. 2NF，无冗余，无插入异常和删除异常
B. 2NF，无冗余，但存在插入异常和删除异常
C. 1NF，存在冗余，但不存在修改操作的不一致
D. 1NF，存在冗余和修改操作的不一致，以及插入异常和删除异常

若内存采用固定分区管理方案，在已分配区可能会产生未用空间，通常称之为（）。

A. 空闲页面
B. 碎片
C. 废块
D. 空闲簇