单项选择题
Questions 18 to 20 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.
What is the speaker’s field of study
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A.Social work.
B.Medical care.
C.Applied physics.
D.Special education.
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单项选择题
What is the main topic of the passage
A.Energy conservation.
B.Transportation of the future.
C.Strip cities.
D.Advantages of air transportation over railroads.
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单项选择题
According to Charles, people send messages via facsimile because
A.it is cheaper and faster than ordinary mail.
B.it is faster and not much more expensive than mail.
C.it can send things that could not be expressed by telex.
D.the Royal Mail could not reach places abroad.
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