题目Air contains ___ which is vital for living things. A. oxygen B. plastic C. cars D. chairs 相关知识点: 试题来源: 解析 A。解析:空气中含有氧气,这对生物至关重要。塑料、汽车和椅子都不是空气中的成分且对生物不是必需的。反馈 收藏
Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved. air (âr) The colorless, odorless, tasteless mixture of gases that surrounds the Earth. Air contains about 78 percent nitrogen and 21 percent oxygen, with the remaining part being made up of argon, carbon dioxide, neon...
aAir is the name given to atmosphere used in breathing and photosynthesis. Dry air contains roughly (by volume) 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases. 空气是名字被给用于呼吸和光合作用的大气。 干燥的空气大致包含(由容量) 78.09%...
as well as mortality rate. Health issues would include ones such as all manner of respiratory ailments, with chronic obstructive pulmonary disease (COPD) very likely to develop, which contains within it a number of respiratory ailments such as pneumonia, bronchitis, emphysema and aggravated asthma ...
22 Air entering human lungs contains approximately 21% oxygen and 0.04% carbon dioxide Which row shows the concentrations of these gases in air leaving the lungs?percentage of percentage of Coxygen carbon dioxide in expired air in expired air A421.0B124.0C164.0D200.4 相关知识点: 试题来源: ...
Looking for a new weight loss plan? Try living on the top of a mountain.Mountain air contains less oxygen than air at lower altitudes so breathing it causes the heart to beat faster and the body to burn more energy.Studies have found that athletes training at high altitudes tend to lose ...
For post-combustion this increase is mainly determined by the heat requirement in the capture process. In oxyfuel combustion the separation of oxygen from the air is the main factor causing a drop in efficiency, i.e. about half of the efficiency penalty when considering a ...
Expired air differs from the inspired air as A. it contains more carbon dioxide. B .it contains less oxygen. C. it contains more water vapour. D. All the above. The amount of air that can be forcibly inhaled beyond the VT is the ___. Which of the following...
Since cooler air is denser (contains more oxygen by volume), a modern engine will compensate by injecting more fuel into the mix to retain a proper air/fuel mixture. The result is more power at a given throttle opening (relative to warmer air). The idea behind a warm air intake (WAI)...
Try living on the top of a mountain.Mountain air contains less oxygen than air at lower altitudes, so breathing it causes the heart to beat faster and the body to burn more energy.Studies have found that athletes training at high altitudes tend to lose weight.Doctor Florian Lippl in Germany...