1) Nitrogen is present in the air. : 氮存在于空气中。 2) Oxygen is presnt in the air. 氧存在于空气中。 3) The universe exists in space. 宇宙存在于太空。 4) It is carried in body fluids. 存在于体液中。 5) consist in 在于,存在于 ...
百度试题 结果1 题目(10)-What is the percentage of nitrogen () in the air?-About 78percent . (percent) 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
百度试题 结果1 题目(10)-What is the percentage of nitrogen(氮) in the air?-About 78 percent . (percent) 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
StickstoffeliminationMassenspektrometrieAnalyses of expired air by mass spectrometry and volume displacement in closed systems suggest that nitrogen (N 2 ) is eliminated by the human lung. The observed nitrogen elimination ranged between 1.5 and 9.1 ml/min (STPD) at rest and up to 30.0 ml/min ...
aAir is a mixture of gases, consists mainly of nitrogen and oxygen, by volume, about 78% of the nitrogen in the air, oxygen and inert gas accounted for 21%, accounted for 0.94, accounting for about 0.03 of the carbon dioxide, water vapor and impurity accounted for about 0.03 of the. ...
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A. Fix nitrogen in the air B. Decompose organic matter C. photosynthesis D. Parasitism 相关知识点: 试题来源: 解析 A。固氮细菌的主要作用是将空气中的氮气固定。分解有机物不是固氮细菌的主要作用;光合作用不是固氮细菌的作用;寄生不是固氮细菌的作用。反馈...
The most common gas in the air is ___. A. oxygen B. nitrogen C. carbon dioxide D. hydrogen 相关知识点: 试题来源: 解析 B。空气中最常见的气体是氮气(nitrogen)。氧气(oxygen)含量次之。二氧化碳(carbon dioxide)和氢气(hydrogen)在空气中的含量相对较少。
at night when at nitrogen atmospher at once immediately at one fling at one s at ones fingersr tips at ones wits end not at ones height at other firms at our peril at phosphoribosyl pyr at proper temperature at qualifying at restaurants at roller gap at sixes or sevens at smith school at...
Clean air is made up of only nitrogen, oxygen, and water. As we have industrialized, our cities have grown and traffic has increased. With these development there has come an increase in the number of by-products released into the air, such as particlesf