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【单选题】
间接能耗与直接能耗之和称为该产品的全能耗。（）A.
是
B.
否
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【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 _______.