外研社新标准大学英语三级网上考试答案Unit4-推荐下载

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Communication
For many of us, communicating with family used to mean sending letters and cards through the mail and getting no response until weeks later. We'd pass hand-written notes to friends in class. We'd pick up the telephone—paying for long-distance calls, no less—and could only talk to one person at a time. On top of that, there were no answering machines to leave messages if a person wasn't home, or Caller ID to screen calls if we didn't feel like picking up the phone. And pay phones were the only option to call home if our car broke down on the side of the road, or if we had to stay after school.
The Good:
For the past decade or so, technology has transformed the way we communicate, in part due to the advent of the Internet. Instead of mailing letters, we're writing e-mails through Gmail or Windows Live Hotmail that can be sent instantaneously to a recipient.
We can even add multiple recipients to these e-mails, so that more than one person can read them.
Even more, we can send greeting cards over the Web with sites like and . No postage needed!
Sending a note to a friend can be done in a matter of seconds
through instant message clients like AOL instant messenge and Meebo. With them, we can see if a "buddy" is available or away, talk to multiple people at a time, "wink" and "sigh" using emoticons, ignore a message if we don't feel like talking, and send links to our favorite Web articles and videos.
We are no longer bound to long-distance charges, either. Many folks have already kicked their
landline phones to the curb and replaced them with Voice-over-Internet protocol (VoIP) and mobile phones. We can place free video calls (yes, we can see the person we're talking to) to anyone in the world over the Internet by using Skype and a headset. For a monthly paid service we can make regular phone calls over the Internet using the popular Vonage service or signing up for VoIP through our cable company.
Mobile phones have become a godsend gift, letting us place calls no matter where we are
—on the way to work, at the beach, at school, etc.
Even text messaging has become an efficient way to get a short message across, such as "Meet you there at 8" or "I'll be home late."
The Bad:
It's true that technology has also made society somewhat impersonal. Here at PC Magazine we communicate with each other mostly through e-mail and instant message. As a result, it's difficult to tell when a person is serious or sarcastic—our clever turns of phrase can easily be misconstrued. Technology tends to make communication drag out more than it has to, too; sometimes it's quicker to just get out of your seat and walk to the person, or simply pick up the phone.
Even worse, younger generations have forgotten how to spell and write complete sentences due to the increased use of text messaging on mobile phones. The State Examination Commission out of Dublin, Ireland said in a report that in many cases, teenagers seemed "unduly reliant on short sentences, simple tenses, and a limited vocabulary" and that with the use of phonetic spelling and little or no punctuation, it's beginning to pose a threat to traditional conventions in writing, not to mention oral communication.
In addition, we've seen how addicted people can become to their smartphones, like the Apple iPhone and the BlackBerry Storm 9530. (You've probably heard the term for it: "CrackBerry.") People possess an obsessive need to constantly check their e-mail, even when on vacation with the family. It's as if we're afraid we'll miss something important or be out of the loop. If there isn't a group for BlackBerry addicts, there should be.—Next: Computing >
Major Essay Proposal
The essay topic I have selected is home computers. I would like to compare the impacts of computers on society with those of other major technologies and try to argue as well as
conclude that home computers have had the greatest impact since the printing press.
My focus in the essay will be how computer technologies are applied to every respect of every day life. My goal is to illustrate as well as convince that without computers, we can not live a life like we do today, but without other technologies, and we may survive. A very simple generalized reason is that computers now can achieve almost everything some other technologies can.
A tentative outline is (sections and section headings subject to change):
Introduction
Overview of computers’ development
Computers’ contribution to society in comparison with other major technologies such as television, operating system, radio or telegraph etc and give examples to support my view
Use as my references well-known recent articles and try to summarize the main point Computers’ impact in the future
What have I learned from all this
Conclusions
References
—————————————–
Introduction
Computers are commonly us ed items in many areas. It is an important thing to people, especially the people who run organizations, industry, etc. Almost anything you know is run or made by computers. Cars and jets were designed on computers, traffic signals are run by computers, most medical equipment use computers and space exploration was
started with computers. Most of the jobs today require the use of computers. These ‘mechanical brains’ made a huge impact on our society. It would be hard if we didn’t have the computer around.
Let’s ivisualize magine for a minute. Let’s think of a world without computers. People in the medical field wouldn’t have found a lot of cures to diseases, since most cures were found with the help of computers. Movies like Jurassic Park would never have been made without computers because they used computer graphics and animation in them.
Famers would have a hard time keeping track of what medications to give to patience.
Counting votes would be impossible without computers and most importantly, space exploration wouldn’t be possible without the help of computers. It’s a pretty tough life without computers. ]
Without computers, all this wouldn’t be possible.
Summary Computers helped us take a large step into the future. Businesses and entertainment uses them to make profits, Education
uses them to help educate students better, and the Medical field uses computers in different ways. Even you are playing computer games, when you are watching the latest movies, or you are researching on a topic for your essay on computer, you are affected by the computer.
Computers absolutely completely changed the world and it keeps changing. Everyone was impacted by this remarkable device. You might disagree with me a little bit, one thing is certain: without computers, we are not anywhere close to where we are today!
References and sources
Blaise Pascal (pronounced [blez pɑskɑl]), (June 19, 1623 –August 19, 1662) was a French mathematician, physicist, and religious philosopher.
Gottfried Wilhelm Leibniz (also Leibnitz or von Leibniz) (July 1 (June 21 Old Style) 1646 – November 14, 1716) was a German polymath who wrote mostly in French and Latin.
Charles Xavier Thomas de Colmar (1785-1870) designed and patented the Arithmometer, in 1820. It was the first successful mechanical calculator that could add, subtract, and multiply.
J ohn Presper Eckert Jr. (“Pres”), a computer pioneer, was born April 9, 1919 in Philadelphia and died June 3, 1995 in Bryn Mawr, Pennsylvania.
Nick Lemons, Computers Impact on Education, Business, Entertainment,
history and future, and the Private Sector.
Alfred Lewis. The New World of Computers. Dodd, Mead, and Company, New York, 1965.
Roger C. Schank and Peter G. Childers. The Cognitive Computer. Addison-Wesley Publishing Co., Inc., Workingham, Berkshire, Amsterdam, Don Mills, Ontario Sydney, 1984.
Swanson, Robert. “Computers.” Grolier Incorporated. Academic American Encyclopedia. Volume 5, Deluxe Library Edition.。