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单项选择题
A．in warm airB．in cold airC．when it reaches the polar regionD．only when the clouds are down low
A．in warm air
B．in cold air
C．when it reaches the polar region
D．only when the clouds are down low
单项选择题
A．The accused are being interrogated.B．The lawyer for the accused is defending the case.C．A witness is giving testimony in court.D．The sentence is being pronounced.
A．The accused are being interrogated.
B．The lawyer for the accused is defending the case.
C．A witness is giving testimony in court.
D．The sentence is being pronounced.
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