单项选择题


Questions 19 to 22 are based on the conversation you have just heard.

A．A player of background music.
B．A researcher on the function of background music.
C．A composer of background music.
D．A fan of background music.
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单项选择题
What can we infer from the passage
A．Valley glaciers flow downhill from mountains and are shaped by the topography.
B．Ice sheets move faster than valley glaciers.
C．Valley glaciers are as old as ice sheets.
D．It takes different time for glaciers to form in different places.
单项选择题
Why does the author mention the formation of glaciers in Iceland and Antarctica in the third paragraph
A．To show the temperature in the two places.
B．To show the environment in the two places.
C．To show the importance of temperature and the rate of snowfall in the formation of glaciers.
D．To show these two places contain the oldest glaciers in the world.
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