单项选择题

A．system
B．device
C．method
D．solution
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单项选择题
Question 30 is based on the following news. At the end of the news item, you will be given 5 seconds to answer the question.Now listen to the news.
A．22 million.
B．36 million.
C．25 million.
D．58 million.
单项选择题
A．signB．signalC．symbolD．mark
A．sign
B．signal
C．symbol
D．mark
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