单项选择题

Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions.
Now listen to the passage.
Codes are scanned by ______.

A．the checkout clerk
B．the customers themselves.
C．a laser beam of light.
D．the cash register.
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问答题
[听力原文]There are many products and services on the market which are similar in content though produced by different Companies. It is vital, therefore, for a company to distinguish itself from its competitors by having a strong company image which is immediately recognizable.Logos are part of this image. They are symbols which often include a name or initials to identify a company. The logo establishes a visual identity for the company, just as different groups of young people express their identity through hairstyles and clothes.Logos are used on letterheads, packaging and brochures as well as on the product itself. They may also appear in newspapers or on television as part of an advertising campaign.The logos of large international companies are instantly recognizable throughout the world. Many companies have, over the years, renewed their logos to fit in with contemporary design and to present more power ful images.
单项选择题
What kind of robots does the man refer to
A．Agricultural robots.
B．Industrial robots.
C．Computers.
D．Electrical robots.
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