单项选择题：牙冠严重缺损，固位型和抗力型较差，经根管治疗的后牙应设计 A．3/4 B．金属全冠

题型：单项选择题

阅读理解。

Imagine you're at a party full of strangers. You're nervous. Who are these people? How do you start

a conversation? Fortunately, you've get a thing that sends out energy at tiny chips in everyone's name tag

(标签). The chips send back name, job, hobbies, and the time available for meeting-whatever. Making

new friends becomes simple.

This hasn't quite happened in real life. But the world is already experiencing a revolution using RFID

technology.

An RFID tag with a tiny chip can be fixed in a product, under your pet's skin, even under your own

skin. Passive RFID tags have no energy source - batteries because they do not need it. The energy comes

from the reader, a scanning device (装置), that sends out energy (for example, radio waves) that starts

up the tag immediately.

Such a tag carries information specific to that object, and the data can be updated. Already, RFID

technology is used for recognizing each car or truck on the road and it might appear in your passport.

Doctors can put a tiny chip under the skin that will help locate and obtain a patient's medical records. At

a nightclub in Paris or in New York the same chip gets you into the VIP (very important person ) section

and pays for the bill with the wave of an arm.

Take a step back: 10 or 12 years ago, you would have heard about the coming age of computing. One

example always seemed to surface: Your refrigerator would know when you needed to buy more milk. The

concept was that computer chips could he put every where and send information in smart network that

would make ordinary life simpler.

RFID tags are a small part of this phenomenon. "The world is going to he a loosely coupled set of

individual small devices, connected wirelessly." Predicts Dr. J. Reich. Human right supporters are nervous

about the possibilities of such technology. It goes too far tracking school kids through RFID tags, they say.

We imagine a world in which a beer company could find out not only when you bought a beer but also

when you drank it. And how many beers, Accompanied by how many biscuits.

When Marconi invented radio, he thought it would be used for ship-to-shore communication, not for

pop music. Who knows how RFID and related technologies will be used in the future. Here's a wild guess:

Not for buying milk.

1. The article is intended to _____.

A. warn people of the possible risks in adopting RFID technology

B. explain the benefits brought about by RFID technology

C. convince people of the uses of RFID technology

D. predict the applications of RFID technology

2. We know from the passage that with the help of RFID tags, people _____.

A. will have no trouble getting date about others

B. will have more energy for conversation

C. will have more time to make friends

D. won't feel shy at parties any longer

3. Passive RFID tags chiefly consist of _____.

A. scanning devices

B. radio waves

C. batteries

D. chips

4. Why are some people worried about RFID technology?

A. Because children will be tracked by strangers.

B. Because market competition will become more fierce.

C. Because their private lives will be greatly affected.

D. Because customers will be forced to buy more products.

5. The last paragraph implies that RFID technology _____.

A. will not be used for such matters as buying milk

B. will be widely used, including for buying milk

C. will be limited to communication uses

D. will probably be used for pop music

查看答案

牙冠严重缺损，固位型和抗力型较差，经根管治疗的后牙应设计 A．3/4 B．金属全冠

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