每日一练：职称英语理工类每日一练(2014-12-21)
【单选题】
Since ancient times people have found various ways to preserve meat．
A．eat
B．cook
C．freeze
D．keep
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每日一练：职称英语理工类每日一练(2014-12-21)
【单选题】
Since ancient times people have found various ways to preserve meat．
A．eat
B．cook
C．freeze
D．keep
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