问题 单项选择题

4台Linux主机通过图6-1所示的方式互联,则实现PC1与PC4之间互访的步骤为:

1.运行 (3) 命令关闭计算机,在PC2与PC3上添加第二块网卡(eth1),重新启动;

2.在PC2与PC3上为第二块网卡分配IP地址,并激活该网络接口,对于PC3,应执行 (4)

3.如果使用routed作为路由器进程,则作为路由器的PC2与PC3仅支持路由协议 (5) ;如果在PC2与PC3上设置静态路由信息并开启路由功能,对于PC2则应执行 (6)

4.在PCI和PC4上配置各自的默认同关,对于PC1,应执行 (7)

(3)处填()

A.reboot

B.shutdown

C.init0

D.init6

答案

参考答案:B

阅读理解

No one likes germs.You wash your hands often and avoid sick people.But some of the germiest places are in your own home where you can’t avoid them!

Over 77,500 bacteria per square centimeter can live in your kitchen sink drain.More bacteria live in and around the sink itself.To get rid of them,clean the entire sink area with a disinfectant

Those wet clothes from your washer are not all that clean,especially if they include underwear.Use hot water and bleach to wash underwear as it contains E.colin(大肠秆菌).Put wet laundry in the dryer quickly so the bacteria do not multiply.

The germs you wash off your body stay in the tub-about 15.500 bacteria per square centimeter! Use a disinfectant to clean your tub weekly.And dry the tub with a clean towel so more germs won’t grow on the wet surface.

You’ll find plenty of germs outside your home too.

Lots of germs live on the buttons of your local ATM.According to www.health.corn,Chinese researchers tested 38 ATMs in downtown Taipei.They found that each button hosted an average of 1,200 germs.Use a hand sanitizer after using the ATM and after handling paper money too.

The bottoms of women’s purses house tens of thousands if not millions of bacteria.University of Arizona researchers discovered all kinds of different bacteria on purse bottoms.These included E.coli as well as bacteria that cause eye and skin infections.Women should wipe their purses every few days with a mild soap solution.

All kinds of germs live on shopping cart shopping cart handles.Lots of people touch the handles each day——and who knows where their hands have been! Carry disinfectant wipes and use them on the handles.That will kill nearly a11 germs.

64.How many germy places are mentioned in this passage?

A.two                        B.four                       C.six                         D.eight

65.What does the underlined word disinfectant mean in the second paragraph?

A.a kind of germ

B.a tablecloth

C.a kind of cleaning tool

D.a kind of chemical liquid which can kill germs

66.Which of the following statement is NOT true according to the passage?

A.Some of the germiest places are outside your home.

B.Use a disinfectant to clean your bathtub weekly.

C.Use a hand sanitizer after using an ATM or handling paper money.

D.Thousands of not millions of bacteria live on the bottoms of women’s purses.

单项选择题