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【单选题】
关于对流层描述错误的是( )A.
最厚在赤道，最两极
B.
空气对流显著
C.
占大气质量的95%
D.
平均厚度10km
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皮皮学刷刷变学霸
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【单选题】Function of the Lungs Blood vessels running all through the lungs carry blood to each air sac, or alveolus (肺泡), and then back again to the heart. Only the thin wall of the air sac and the thin wall o...
A.
Nitrogen is absorbed from the air
B.
About one-fifth of the carbon dioxide and about one-half of the oxygen in the air goes into the blood
C.
The moisture in the air is almost completely evaporated
D.
About one-fifth of the oxygen in the air goes into the blood and an equivalent amount of carbon dioxide enters the air from the blood
【简答题】In lungs, each bronchiole terminates in a small group of air sacs, called _______.
【简答题】量子力学的诞生日是( )