热泵是一个逆向运转的热机,可用来作为空气调节器,进行制冷或制热。设冬季运行时的室外温度(平均)为4℃,冷凝器(用于制热)平均温度为50℃。设夏季运行时的室外温度(平均)为35℃,蒸发器(用于制冷)平均温度为4℃,若要求制热(制冷)量为105kIJ·h-1,试求空调运行时最小理论功率各为多少?
第1题
The intentions of those who coined the term 'ecotourism' were sincere.
A.YES
B.NO
C.NOT GIVEN
第2题
A、John Donne
B、Samuel Johnson
C、Andrew Marvell
D、George Herbert
第3题
"Lost Generation" is a term first coined by ---.
A.Ernest Hemingway
B.Fitzgerald
C. Gertrude Stein
第4题
Who used the term Singularity to refer to the era when human beings are replaced?
A.A mathematician.
B.A computer scientist.
C.A science-fiction writer.
D.A computer entrepreneur.
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