单项选择题


Questions 4 to 6 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions.
Now listen to the conversation.
What does the man see the future of computers

A．We will always have traditional PCs.
B．We will see PowerMacs getting popular with people.
C．Computers will be more friendly.
D．There will be an era of distributed devices.
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单项选择题
What does the speaker say about ancient Greeks who traveled south
A．They noticed an apparent change in the position of the North Star.
B．They observed eclipses at different rimes of the year.
C．They were the first to estimate the distance between heavenly bodies.
D．They wanted to prove that the Earth was flat.
单项选择题
Where dill De Forest begin regular radio broadcasts
A．In Massachusetts.
B．On ships.
C．In New York.
D．On ships in New York harbor.
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