单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage. Which of the following can best serve as the title of the passage

A．Communications.
B．Computers.
C．Telecommunications.
D．Glass-fiber Technology.

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单项选择题

单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage. Which of the following can best serve as the title of the passage 您的浏览器不支持 audio 元素。