● WWW 服务器与客户机之间采用　（69）　协议进行网页的发送和接收。

（69）A. HTTP　B. URL　C. SMTP　D. HTML

• 通过局域网接入因特网如下图所示，图中箭头所指的两个设备是　（70）　。

（70）A. 二层交换机　B. 路由器C. 网桥　D. 集线器

● Insufficient （71） can cause a processor to work at 50% or even more below its performance potential.

（71）A. mouseB. I/OC. document　D. memory

● The （72） in e-mail messages has affected almost every computer around the world and has caused the damage of up to US$1 billion in North America.

（72）A. illness　B. virus　C. weakness　D. attachment

● One of the basic rules of computer security is to change your （73） regularly.

（73）A. nameB. computerC. deviceD. password

● One of the greatest features of a home （74）is the ability to share one Internet connection simultaneously over two or more computers.

（74）A. computerB. device　C. networkD. work

● The usual address for a Web site is the （75）page address, although you can enter the address of any page and have that page sent to you.

（75）A. homeB. mainC. hostD. house

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