单项选择题

A．Europe.
B．Africa.
C．America.
D．Asia.
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单项选择题
Which of the following phrases in the fifth paragraph indicates the fridge’’s negative effect on the environment
A．Hum away continuously.
B．Climatically almost unnecessary.
C．Artificially-cooled space.
D．With mild temperatures.
单项选择题
B
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