考虑页面置换算法，系统有m个物理块供调度，初始时全空，页面引用串长度为p，包含了n个

先化简再求值， [(x+2y)(x-2y)-(x+4y)]÷4y，其中x=5，y=2。

发动机的FDU（火警探测组件）探测到环路B处于正常状态而环路A处于火警状态且时间超过16秒，则FDU输出（）

A.火警信号

B.环路A故障信号

C.环路B故障信号

D.火警探测故障信号

Dear teachers, do you want to find pen pals for your students? Boys and girls, do you want to find your own e-pals (网友)? Here is some advice on how to make e-pals.

First, take a look at www.spoton.de community (社区). Click on international pen pal sites to find some of our favorite international e-pal and pen pal web sites. Do not forget: some e-pal services are not free and some are safer than others. Remember to read a web site safety warning before you join!

KidFu (www.kidfu.com) says it is the safest place online for kids to chat, play games and make friends. Get your parents to help you register (注册) and then you can write things about yourself or read what other kids have written. There are also chat monitors that make sure that the online chat rooms are safe and friendly. KidFu costs money, but the first month is free.

If you join Epals (www.epals.com), you can choose a pen pal among 65,000 kids from 191 countries. You can also find information about how teachers can get pen pals for their pupils.

Or if you want to start sending e-mails right now, go to Europa Pages (www.europapage.com/

penpal-form.html). Lots of young people have written their names, interests, home countries and their e-mail addresses. Just click on a name and start writing!

小题1:Who is the passage written for?

A．Teachers and parents.

B．Parents and their children.

C．Teachers and children

D．Workers and doctors.小题2:If you want to choose a safe web site, you can click on       .

A．www.kidfu.com

B．www.spoto.de

C．www.epals.com

D．www.europapage.com/penpal-form.htm!小题3: What is the advantage of Europa Pages?

A．It is the safest.

B．It is free.

C．You can choose more pen pals from a great number of countries.

D．You can start sending e-mails at once.小题4:What is a chat monitor mentioned in the 3rd paragraph?

A．It is a person controlling the chat.

B．It is a person sent by the police to keep order in the chat rooms.

C．It is a person in the web site to give safe online advice.

D．It is a kind of software (软件) to keep online chatting friendly and safe.

在项目组合管理中，在组织范围内为项目分配资源。组织级项目管理中的资源平衡过程主要是：（）

A.首先为单个项目做资源平衡，再在项目间进行资源平衡

B.针对所有项目的需求对组织内的资源进行统一的资源平衡

C.只在单一项目内进行资源平衡

D.主要针对资源短缺的项目进行资源优化与平衡

对各种类型癫痫均有治疗作用的药物是（）。

A.苯妥英钠

B.地西泮

C.乙琥胺

D.苯巴比妥

E.丙戊酸钠