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【多选题】
表征高压断路器的电气技术特性的参数有___________________________。A.
额定电流；
B.
额定电压；
C.
额定开断电流；
D.
额定热稳定电流；
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举一反三
【单选题】In this experiment, they were wakened several times during the night, and asked to report what they ______.
A.
have just been dreaming
B.
had just been dreaming
C.
are just dreaming
D.
had just dreamt
【简答题】A．During the summer. B．During spring and autumn. C．As seldom as possible. D．Several times throughout the year.
【简答题】People may hear______700 times during Christmastime.
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