"What is the QR code?" What is the QR code of the reading material?
? Qi Lin
① A family farm in Lacome, Alberta applied for the certification of a strange corn maze, which became the largest available QR code in Guinness World Records. This corn maze covers an area of 28,760 square meters. If someone takes a helicopter and scans this maze pattern with a smart phone over the corn maze, they can automatically jump to the exclusive website of the farm. Originally a tool to identify business information, it has become interesting.
② What is it?
③ A. Two-dimensional code is a new generation of bar code technology, which uses specific geometric figures to distribute rectangular squares with alternating two colors on a plane (that is, two-dimensional direction) according to certain rules to record data symbol information. It looks like a two-color square maze. It is different from the common bar code (that is, one-dimensional code). B. In terms of information expression, two-dimensional code can express different information in both horizontal and vertical directions, so it can store dozens of times as much information as bar code, and can integrate information such as images, sounds and characters. Functionally, the QR code not only has the basic recognition function and is easy to read, but also can display more detailed product content and save paper.
④ There are many kinds of QR codes, among which the most common one was invented by Denso -Wave Company in 1994, and QR is the abbreviation of English Quick Response. Obviously, the inventor just hopes that the QR code can quickly decode its content, which is also the most remarkable feature of the QR code at present.
⑤ In addition, the characteristics of QR code include good confidentiality, low manufacturing cost, large capacity and wide coding range. It also has an error correction function. When the damaged area of the QR code reaches 50%, the information can still be recovered and read correctly. Its decoding reliability is high, and the error rate does not exceed one in ten million.
⑥ Besides being widely used in archive information storage, logistics and transportation management, identity recognition, multimedia reading, online shopping, instant dating software, advertising marketing, electronic billing and other fields, some novel applications are being continuously explored.
⑦ QR code house number. Recent innovative R&D experiments in Panyu District, Guangzhou? Rent a smart phone inspection system? . When renting a house, the manager can read the two-dimensional code information on the house number with a smart phone, so as to accurately obtain the address information.
8 QR code bus service. Want to know how far your bus is from the station, or how many minutes it takes to get to the terminal, just scan the QR code with your mobile phone and log on to the bus service website, and you can easily know. At present, many cities in China have begun to realize this kind of bus service. Bus passengers can not only get all the ride information, but also get the information about eating, drinking and having fun near the bus station, and the lost and found can also be released through this platform.
Pet-name ruby anti-counterfeiting invisible QR code. Because of the further development of printing technology such as phosphor, some commodities begin to use invisible QR codes. These invisible QR codes are invisible to the naked eye and must be scanned and verified by infrared laser irradiation. Because the production process of this technology is complex, counterfeiters can't copy it easily.
Attending two-dimensional code navigation. An international sculpture exhibition held in Shanghai introduced the technology of two-dimensional code nameplates (signboards installed on machines, meters, motor vehicles, etc.). ). After taking pictures of the QR code and decoding it, smartphone users can hear the specific voice introduction about the sculpture by sticking their mobile phones to their ears, which not only saves the trouble of voice navigation, but also won't disturb other visitors because of the introduction of big speakers. (Excerpted from Yangcheng Evening News, with deletion)
"What is a QR code?" Reading exercise 7. The explanation method and function of the underlined two sentences in the third paragraph are correct ()
A.A. explained the shape of two-dimensional code accurately by annotation.
B.A. scientifically and accurately reveals the essential characteristics of two-dimensional code by using the method of definition.
C.B. uses an example to illustrate the characteristics of QR code, which is very convincing.
D.b only uses the explanation method of column number, which shows that the storage capacity of QR code is very large in quantity.
8. One of the mistakes in understanding the content of this article is ().
A. quote the object of news introduction at the beginning to stimulate readers' interest in reading.
B. The main features of QR code are large amount of information, convenient reading, detailed content and fast decoding.
C. Paragraph 6 of the anthology (10) mainly explains the novel application of QR code.
D. Some commodities began to use invisible QR codes because counterfeiters could not copy them.
9. The following statement about language analysis is correct ().
A.？ Does the new generation barcode technology for recording data symbol information look like a two-color square maze? There is a sentence with a simple explanation.
B.？ When the damaged area of the QR code reaches 50%, the information can still be recovered and read correctly. Its decoding reliability is high, and the bit error rate is less than one in ten million? Are you online? No more than? Replace with? About what? Explain that the meaning remains unchanged.
C.？ The inventor just hopes that the QR code can quickly decode its content, which is also the most remarkable feature of the QR code at present? Are you online? At present? The word "time" emphasizes the rigor of explanatory language.
D.？ Two-dimensional code is a new generation of bar code technology, which uses specific geometric figures to distribute rectangular squares with alternating two colors on the plane according to certain rules to record data symbol information. Is it different from ordinary bar codes? In the sentence? Common? It is still accurate to delete explanatory language.
"What is a QR code?" Read answer 7. B
8.B