题目内容
（请给出正确答案）
The scanner reads the product information through a camera,
A．Right
B．Wrong
C．Doesn't say
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更多“The scanner reads the product information through a camera,A．RightB．WrongC．Doesn't say”相关的问题
● An optical scanner reads printed （）and graphics and then translates the results into a form computer can use. （）A.text B.interface C.number D.photo
A light-sensing input device that reads printed text and graphics and then translates the results into a form. the computer can use is called a ().
A、bar code reader
B、scanner
C、camera
D、microphone
The code is called the Universal Product Code (UPC). It is designed to add speed and efficiency to stores by using computers. It can do this in several ways. First, it is not necessary for workers to put individual prices on items. Errors in prices are eliminated, or done away with. Also, the time spent checking out is reduced. UPC gives an itemized receipt to the customer with all the items, prices, and totals. The store clerk does not need to spend time checking the price on the item and punching it into cash register. This UPC computerized system will probably save as much as 45 percent of the checkout clerk's time.
What do the stripes mean？ How does the computer interpret the stripes？ The number printed below the vertical bars identifies the manufacturer and the manufacturer's item. As many as 10 trillion individual machinereadable numbers can be used with this system.
Codes are scanned by ______.
A．the checkout clerk
B．the customers themselves.
C．a laser beam of light.
D．the cash register.
The Kurzweil machine consists 【B8】 three parts: a scanner, a computer, and a voice synthesizer (合成器). These 【B9】 parts are like your eyes, your brain, 【B10】 your voice. The scanner is 【B11】 "eye" of the machine. It scans or looks at the words on the page of a book and 【B12】 them into digital signals. These digital signals then 【B13】 to the computer, the "brain" of the machine. The computer analyzes the 【B14】 and recognizes the words. The computer 【B15】 information about the words to the voice synthesizer. The voice synthesizer makes the sounds of the words.
To use the machine, a blind person simply 【B16】 the book and puts its face down on the scanner (like a photocopy machine). The machine "reads" the words on the page. When one 【B17】 is finished, the blind person turns the page and puts the book on the scanner 【B18】 . The Kurzweil machine can read 【B19】 a normal voice or in a special fast voice. It can read words 【B20】 small letters, large letters, or italics.
【B1】
A．questions
B．problems
C．puzzles
D．exams
The code is called the Universal Product Code (UPC). h is de signed to add speed and efficiency to stores by using computers. It can do this in several ways. First, it is not necessary for workers to put individual prices on items. Errors in prices are eliminated, or done away with. Also, the time spent checking out is reduced. UPC gives an itemized receipt to the customer with all the items, prices, and totals. The store clerk does not need to spend time checking the price on the item and punching it into cash register. This UPC computerized system will probably save as much as 45 percent of the checkout clerk's time.
What do the stripes mean？ How does the computer interpret the stripes？ The number printed below the vertical bars identifies the manufacturer and the manufacturer's item. As many as 10 trillion individual machine-readable numbers can be used with this system. In the example, the 0 on the left side means that it is a grocery item. The numbers 51000 indicate the manufacturer. In this case it is the Campell Soup Company. The last five digits, 00011, mean it is a can of tomato soup. The light rays from the light beam read these lines, and the message is sent directly to the computer. The computer then finds the information about this product (price, inventory data) and sends it instantly back to the terminal at the checkout counter. At the same time, it keeps an inventory for the store manager. Many products have labels with these stripes.
The Universal Product Code______.
A．makes grocery shopping easier
B．makes grocery shopping complicated
C．cuts down on efficiency
D．will never be practical
Universal Product Code
What are the zebra stripes (See the figure) on the Instant Mashed Patato Flakes package？ They are special black and white vertical lines. These black and white stripes can be read by an optical scanner, or computer. The "scanner", which reads the lines of code, is a small laser beam of light. When the light rays is broken by the black stripes, the computer "reads" the information about the product.
This code is called the Universal Product Code (UPC). It is designed to add speed and efficiency to stores by using computers. It can do this in several ways. First, it is not necessary for workers to put individual prices on items. By using UPC, the computer can print out the accurate price of the item. Errors in prices are eliminated, or done away with. Also, the time spent checking out is reduced UPC gives an itemized receipt to the customer with all the items, prices, and totals. The store clerk does not need to spend time checking the price on the item and punching it into the cash register. This UPC computerized system will probably save as much as 45 percent of the checkout clerk's time.
What do the stripes mean？ How does the computer interpret the stripes？ The number printed below the vertical bars identifies the manufacturer and the manufacturer's item. As many as 10 trillion individual machine-readable numbers can be used with this system. In the example, the 0 on the left side means that it is a grocery item. The numbers 36800 indicate the manufacturer, in this case it is the Food Club Company. The last five digits, 51512, mean it is a pack of mashed patato flakes. The light rays from the light beam read these lines, and the message is sent directly to the computer. The computer then finds the information about this product (price, inventory data) and sends it instantly back to the terminal at the checkout counter. At the same time, it keeps an inventory for the store manager. Many products have labels with these stripes.
The figures printed below the stripes are codes of the producer and the product.
A．right
B．wrong
C．Doesn't say
● Read the following passage.
● Are sentences 16-22 “Right” or "Wrong"？ If there isn't enough information to answer "Right" or "Wrong", choose "Doesn't say".
● For each sentence 16-22, mark one letter (A, B or C) on your Answer Sheet.
Universal Product Code
What are the zebra stripes (See the figure) on the Instant Mashed Patato Flakes package？ They are special black and white vertical lines. These black and white stripes can be read by an optical scanner, or computer. The "scanner", which reads the lines of code, is a small laser beam of light. When the light rays is broken by the black stripes, the computer "reads" the information about the product.
This code is called the Universal Product Code (UPC). It is designed to add speed and efficiency to stores by using computers. It can do this in several ways. First, it is not necessary for workers to put individual prices on items. By using UPC, the computer can print out the accurate price of the item. Errors in prices are eliminated, or done away with. Also, the time spent checking out is reduced UPC gives an itemized receipt to the customer with all the items, prices, and totals. The store clerk does not need to spend time checking the price on the item and punching it into the cash register. This UPC computerized system will probably save as much as 45 percent of the checkout clerk's time.
What do the stripes mean？ How does the computer interpret the stripes？ The number printed below the vertical bars identifies the manufacturer and the manufacturer's item. As many as 10 trillion individual machine-readable numbers can be used with this system. In the example, the 0 on the left side means that it is a grocery item. The numbers 36800 indicate the manufacturer, in this case it is the Food Club Company. The last five digits, 51512, mean it is a pack of mashed patato flakes. The light rays from the light beam read these lines, and the message is sent directly to the computer. The computer then finds the information about this product (price, inventory data) and sends it instantly back to the terminal at the checkout counter. At the same time, it keeps an inventory for the store manager. Many products have labels with these stripes.
The figures printed below the stripes are codes of the producer and the product.
A．Right
B．Wrong
C．Doesn't say
Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文： What are the zebra stripes on the tomato soup cans and potato chip bags？ They are special black and white vertical lines. These black and white stripes can be read by an optical scanner, or computer. The "scanner", which reads the lines of code, is a small laser beam of light. When the light ray is broken by the black stripes, the computer "reads" the information about the product.
This code is called the Universal Product Code (UPC). It is designed to add speed and efficiency to stores by using computers. It can do this in several ways. First, it is not necessary for workers to put individual prices on items. By using UPC, the computer can print out the accurate price of the item. Errors in prices are eliminated, or done away. with. Also, the time spent checking out is reduced. UPC gives an itemized receipt to the customer with all the items, prices, and totals. The store clerk does not need to spend time checking the price on the item and punching it into the cash register. This UPC computerized system will probably save as much as 45 percent of the checkout clerk's time.
What do the stripes mean？ How does the computer interpret the stripes？ The number printed below the vertical bars identifies the manufacturer and the manufacturer's item. As many as 10 trillion individual machine-readable numbers can be used with this system. In the example, the 0'on the left side means that it is a grocery item. The numbers 51000 indicate the manufacturer. In this case it is the Campbell Soup Company. The last five digits, 00011, mean it is a can of tomato soup. The light rays from the light beam read these lines, and the message is sent directly to the computer. The computer then finds the information about this product (price, inventory data) and sends it instantly back to the terminal at the checkout counter. At the same time, it keeps an inventory for the store manager. Many products have labels with these stripes.
(27)
A．By the checkout clerk.
B．By the customers themselves.
C．By a laser beam of light.
D．By the cash register.
SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： No Englishman believes in working from book learning. He suspects all theories, philosophic or other. He suspects everything new, and dislikes it, unless he can be compelled by the force of circumstances to see that this new thing has advantages over the old. Race-experience is what he invariably depends upon, whenever he can, whether in India, in Egypt, or in Australia. His statesmen do not consult historical precedents in order to decide what to do: they first learn the facts as they are; then they depend on their own common sense, not at all upon their university learning or upon philosophical theories. And in the case of the English nation, it must be acknowledged that this instinctive method has been eminently successful
The judgment of the Englishman by all other European peoples is that he is the most suspicious, the most re- served, the most unreceptive, the most unfriendly, the coldest-hearted, and the most domineering of all western peoples. Ask a Frenchman, an Italian, A German, a Spaniard, even an American, what he thinks about English- men; and every one of them will tell you the very same thing, But you would find upon the other hand that nearly all nations would speak highly of certain other English qualifies…energy, courage, honor, justice. They would say that although no man is so difficult to make friends with, the friendship of an Englishman once gained is stronger and more true than any other,
Which of the following is NOT suggested in the passage？
A．Englishman seldom reads books.
B．Englishman is suspicious.
C．Englishman dislikes anything new.
D．Englishman depends on their common sense.
Digital Camera
In the past twenty years, most of the major technological breakthroughs in consumer electronics have really been part of one larger breakthrough. Whet, you get down to it, CDs, DVDs, HDTV, MP3s and DVRs are all built around the same basic process: convening conventional similar information(represented by a fluctuating wave) into digital information (represented by ones and zeros, or bits). This fundamental shift in technology totally changed how we handle visual and audio information—it completely redefined what is possible.
The digital camera is one of the most remarkable instances of this shift because it is so truly different from its ancestor. Conventional cameras depend entirely on chemical and mechanical processes, you don't even need electricity to operate them. On the other hand, all digital cameras have a built-in computer, and all of them record images electronically.
The new approach has been enormously successful. Since film still provides better picture quality, digital cameras have not completely replaced conventional cameras. But, as digital imaging technology has improved, digital cameras have rapidly become more popular.
Understanding the Basics
To get a digital image, you need the image to be represented in the language that computers recognize—bits and bytes. Essentially, a digital image is just a long string of 1s and 0s that represent all the tiny colored dots—or pixels(像素)—that collectively make up the image.
If you want to get a picture into this form, you have two options:
You can take a photograph using a conventional film camera, process the film chemically, print it onto photographic paper and then use a digital scanner to sample the print(record the pattern of light as a series of pixel values).
At its most basic level, this is all there is to a digital camera. Just like a conventional camera, it has a series of lenses that focus light to create an image of a scene. But instead of focusing this light onto a piece of film, it focuses it onto a semiconductor device that records light electronically. A computer then breaks this electronic information down into digital data.
A Filmless Camera
Instead of film, a digital camera bas a sensor that converts light into electrical charges. The image sensor employed by most digital cameras is a charge coupled device(CCD). Some cameras use complementary metal oxide semiconductor(CMOS) technology instead. Both CCD and CMOS image sensors convert light into electrons. A simplified way to think about these sensors is to think of a 2-D array of thousands or millions of tiny solar cells.
Once the sensor converts the light into electrons, it reads the value(accumulated charge) of each cell in the image. This is where the differences between the two main sensor types kick in:
A CCD transports the charge across the chip and reads it at one corner of the array. An analog-to-digital converter(ADC) then turns each pixel's value into a digital value by measuring the amount of charge at each photosite and converting that measurement to binary(二进制) form.
CMOS devices use several transistors at each pixel to enlarge and move the charge using more traditional wires. The CMOS signal is digital, so it needs no ADC.
Capturing Color
Unfortunately, each photosite is colorblind. It only keeps track of the total intensity of the light that strikes its surface. In order to get a full color image, most sensors use filtering to look at the light in its three primary colors. Once the camera records all three colors, it combines them to create the full spectrum(光谱).
There are several ways of recording the three colors in a digital camera. The highest quality cameras use three separate sensors, each with a different filter. Another meth
A．Y
B．N
C．NG
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