阅读理解：It is impossible to ignore the popularity of Quick Response(QR) codes in China. These are square-shaped black-and-white symbols in WeChat or Alipay where QR codes are scanned to add new f...
It is impossible to ignore the popularity of Quick Response(QR) codes in China. These are square-shaped black-and-white symbols in WeChat or Alipay where QR codes are scanned to add new friends or make payment.
The QR Code system originated in Japan. The engineer Masahiro Hara felt the limitation of the one-dimension bar code in use and thus developed the QR codes which could carry data horizontally and vertically. QR codes could hold much more information than bar codes due to their extra dimension. In addition, QR codes have larger data capacity, smaller print-out size and higher resistance to damage.
Though the technology of QR codes is complicated, we can easily create our own QR codes with the help of QR code generators, many of which are available online for free. Users could enter the data they wish the QR code to display, and the generator turns it into a symbol that can be printed or displayed in electronic form. The process of creating QR codes could be really fun when we customize the design of the codes according to our specific needs. For instance, we can adjust the color, add a logo, and create social options, etc. Moreover, dynamic QR codes are also available. They are more various than standard QR codes because they allow users to edit data entered previously, whereas data in standard QR codes cannot be edited once printed. Besides, don’t limit your QR code to one mobile scanner. Anyone can scan your code with any reader. A lower barrier to entry makes success more likely for you and the user.
Meanwhile, we must also recognize the vulnerability of QR codes. Due to their easy access, criminals can steal simply by replacing the QR codes with their own, transfering cash to their own bank accounts. Hence, we should all become more conscious of virtual money transactions through QR codes and take additional security measures.
问题：
1.Which of the following is NOT a function of QR codes?
A.Data storage.
B.Scanning a reader.
C.Social networking.
D.Mobile payment.
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【参考答案】B
［考点］事实细节题
【精析】B 根据第一段第二句“…QR codes are scanned to add new friends or make payment.”和第二段最后一句“…QR codes have larger data capacity…”可知，通过扫描二维码可以添加新朋友或进行支付，而二维码本身可以储存大量数据，所以A项（数据存储）、C项（网络社交）和D项（移动支付）均是二维码的功能；B项（扫描电子识读机）在文中并未提及。故选B。
2.Why is the bar code mentioned in Paragraph 2?
A.To introduce the main topic.
B.To show the author’s attitude.
C.To highlight the features of QR codes.
D.To add some background knowledge.
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【参考答案】C
［考点］推理判断题
【精析】C 根据第二段内容可知，日本工程师Masahiro Hara意识到一维条码在使用中的局限性，因此开发出了可以横向和纵向携带数据的二维码；由于二维码的额外维度，它能储存的信息比条形码多得多；它还具有更大的数据容量、更小的打印尺寸和更高的抗损坏性。由此可推知，作者在第二段中提及条形码是为了通过与其对比，突出二维码的特点。故选C。
3.Which of the following best explains “vulnerability” underlined in Paragraph 4?
A.Threat.
B.Weakness.
C.Difficulty.
D.Simplicity.
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4.How could we customize the QR code of our own?
A.By adding a special logo.
B.By changing the color.
C.By creating various social options.
D.All of the above.
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