单项选择题

Question 26 and 27 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the question. Now listen to the news. What has the NASA report revealed

A．The global warming is slowing down.
B．The world’s climate is changing dramatically.
C．The ice around the arctic is disappearing very quickly.
D．A big storm has been formed around the arctic.
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单项选择题
What are the students going to use a tape recorder for
A．To practice speaking slowly.
B．To record a voice from the television.
C．To play a speech by the professor.
D．To evaluate their own voices.
单项选择题
What important discovery about seismic waves does the instructor mention
A．They occur at regular intervals.
B．They can withstand great heat.
C．They travel through the Earth’s interior.
D．They can record the Earth’s internal temperature.
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