[单项选择]

Modem computers based onare（）millions to billions of times more capable than the early computers, which occupy a fraction of the space. Simple computers are small enough to fit into mobile devices, and mobile computers can be powered by small batteries. Personal computers in their various forms are icons of the Information Age and are what most people think of as ‘computers’.

A. central processing unit
B. integrated circuits
C. hard disk
D. software integration

[单项选择]Each day, computers help millions of people do their jobs more effectively. For example, they can help managers decide on a future course of action, and they can then help with the follow-up checks on performance to see if planned goals are being achieved．By using accurate and timely facts supplied by data base management software, a manager can do a better job of identifying problems and opportunities. And managers may not need to spend as much time in controlling when a computer can respond with a triggered report if actual performance varies from what was planned．The time saved in controlling may allow managers to give more attention to employees’ concerns, and this, in turn, may result in improved morale (士气).
But employment benefits certainly aren’t restricted to managers. Healthcare researchers and other scientists also use computers to conduct research into complex problem areas that couldn’t otherwise be studied．Lawyers use online legal data banks to locate precedent (先前的
A. Helping managers decide on a future course of action.
B. Helping managers check if planned goals are reached．
C. Helping managers save time in writing a report.
D. Helping managers design a spreadsheet package.

[单项选择]Internet, a （　） of millions of computers linked worldwide, is the largest system serving email messengers.
A. unity
B. connection
C. network
D. combination

[单项选择]Floods cause billions of dollars worth of property damage______.
A. relatively
B. actually
C. annually
D. comparatively

[填空题]

For instance, with billions of dollars of used goods are now sold on internet auction sites, notably on the hugely successful eBay. Second-hand cars are now eBay’s biggest category, sales that

[填空题]Must-see Websites
The Internet has billions of websites. You could spend your whole life surfing the web and never visit them all! Are you looking for some fun and educational sites Don’t miss out one or these two.
Wikipedia
Do you want to learn more about how hip hop music developed You can look for this in- formation and more in Wikipedia. Wikipedia is a free, online encyclopedia(百科全书). It has more than 2 million articles written in over 100 languages. It is the most popular reference site online because of its large amount of information.
Google Earth
Are you planning a trip and want to see the place in advance With Google Earth, you can see pictures of any place on Earth. First, you must download(下载) its special software. Then you simply type in an address. Google Earth will show you a recent satellite image of the location. You can even see your own house.
Information like business and road names is added to the pictures. You can use t

[判断题]DDF专线MODEM的LIFE灯亮时表示MODEM告警。
A.正确
B.错误

[单项选择]The Olympic Games were watched by（）billions of people around the world
A. virtually
B. literally
C. deliberately
D. appropriately

无法Ping通ADSL Modem

无法Ping通ADSL Modem 怎么办？？？？

[单项选择]家里拨号上网需要使用MODEM。下面关于MODEM的说法中错误的是______。
A. 调制器完成将模拟信号恢复成数字信号的功能
B. MODEM的调制方式主要有：振幅调制、频率调制和相位调制
C. MODEM主要分为外置式、内置式、插卡式和机架式
D. MODEM的传输模式主要有：传真模式、语音模式

[单项选择]当作为RS—232接口标准中DCE设备的MODEM和作为DTE设备的计算机相连时，MODEM收到呼叫信号后向计算机发送的信号是 (24) 。
A. 载波检测
B. 振铃指示
C. DTE就绪
D. DCE就绪