问题 单项选择题

随着微型计算机的广泛应用,大量的微型计算机是通过局域网连入到广域网的,而局域网与广域网的互联一般是通过 ______ 设备实现的。

A.Ethernet交换机

B.路由器

C.网桥

D.电话交换机

答案

参考答案:B

解析:[知识点] 网络互联技术与互联设备
[评析] 在因特网中,用户计算机需要通过校园网、企业网或ISP联入地区主干网,地区主干网通过国家主干网联入到国家间的高速主干网,这样就形成一种路由器互联的大型、层次结构的互联网络。

阅读理解

Homework should be done as soon as you get home from school. If you have after-school activities, the homework should be done first. At the same time, it is fine to allow(允许)for a snack break and also to allow for stretching(拉伸的)breaks.

Also, you should remember that it is your duty to do your homework. Next time, when you want to depend on(依靠) Mom and Dad for help, please try to find the answer yourself, because you will learn much, much more that way.

When you have a question, especially something about a science or math, don’t always turn to your teacher! It is a good idea to try to find the answer yourself. If this doesn’t work, you can also look at the materials in the back of the book. They may guide you to the pages you should look at to help you understand the problem.

Finally, while doing homework, don’t think about or do other things. Keep working. Setting a time limit(限制) often helps with this. Different ages decide different amounts of time. 10-15 minutes is good for a child that’s aged 6-8. A time of 20-30 minutes is about right for a child aged 9-12. Kids can keep studying for 30-45 minutes from the ages of 13 to 15. This, of course, depends on your abilities to pay attention and stay on tasks.

小题1:In the first paragraph, the writer mainly tells us that ______.

A.doing homework is the first thing you should do at home

B.after-school activities can’t affect doing homework

C.parents can help kids with their homework at night

D.kids need a good rest after school小题2:In the third paragraph,   the writer wants to tell us that ______.

A.students should ask the teacher more questions

B.thinking over the questions before asking others is important

C.problems can’t be solved without a teacher’s help

D.students shouldn’t always look at the materials in the back of the book小题3:The passage mainly tells children ______.

A.not to look away while doing homework

B.to do homework by themselves

C.not to turn to teachers when doing homework

D.to do their homework quickly and in the right way’

单项选择题 A1/A2型题