单项选择题

A．number
B．percentage
C．part
D．population
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单项选择题
A．Very interesting.B．Very miserable.C．Very poor.D．Very wealthy.
A．Very interesting.
B．Very miserable.
C．Very poor.
D．Very wealthy.
单项选择题
A．A severe acute respiratory syndrome.B．The famous family named Sars.C．The ship named Sars .D．The research institute named Sars .
A．A severe acute respiratory syndrome.
B．The famous family named Sars.
C．The ship named "Sars".
D．The research institute named "Sars".
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