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【多选题】
地面热量主要来源于( )。A.
太阳总辐射
B.
地面吸收的大气逆辐射
C.
蒸发潜热
D.
凝结潜热
E.
暖空气以乱流方式传向地面的热量
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举一反三
【简答题】A．The well. B．The wheels. C．The ears. D．His ears.
【单选题】"Trade agreements grease the wheels of importing and exporting". The phrase "grease the wheels" means .
A.
to keep the balance of something
B.
to make something go well or go on smoothly
C.
to interfere with the development of something
D.
to negotiate about something
【简答题】简述 制冷剂的压焓图的“一点”、“三区”、“五态”、“八线”分别是什么含义?
【单选题】We can learn from the text that the wheels of the Grout Portable .
A.
were difficult to separate
B.
could be split into 6 pieces
C.
were fitted with solid tyres
D.
were hard to carry on a train
【单选题】The carried power from the engine crankshaft to the car wheels so the wheels rotate and car moves.
A.
steering system
B.
running system
C.
power train
D.
brake system
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