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.
How do thermographic pictures indicate the temperature of various parts of the body

A．With charts and graphs.
B．With a thermometer.
C．With different colors.
D．With moving lights.

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单项选择题

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. How do thermographic pictures indicate the temperature of various parts of the body 您的浏览器不支持 audio 元素。