A天空为什么是蓝色的?The air we breathe is mostly nitrogen(氮气)and oxygen, two gases that have no colour. So why does the sky look so blue, a colour that gives people a feeling of peace?Lord Rayleigh, a scientist in England, realized that the nitrogen and oxygen molecules(分子)are the ...
a gas, or as part of the air we breathe, underscoring its importance in both natural and industrial processes.In the atmosphere, nitrogen constitutes a substantial portion, contributing to the air we inhale and the clouds that gather overhead. Its presence is essential for life, ser...
3、Sincenitrogenis four fifths of the air we breathe, they are surprisingly optimistic about raising the temperature on Mars and believe it could be done in hundred years.(由于氮占我们呼吸的空气的五分之四,他们对提高火星的温度持惊人的乐观态度,相信这可以在一百年内完成。) ...
Almost 80 percent of the air we breathe consists of nitrogen. All living things need the gas to build proteins and other materials, but only a few organisms can actually convert nitrogen from the air into a form we can absorb. Now researchers from Michigan State University have found a new...
The gas that we breathe in is ___. A. oxygen B. nitrogen C. carbon dioxide D. hydrogen 相关知识点: 试题来源: 解析 A。解析:我们吸入的气体是氧气(oxygen)。氮气(nitrogen)在空气中含量最多但不是我们吸入的主要气体,我们呼出二氧化碳(carbon dioxide),氢气(hydrogen)不是我们呼吸的气体。阅读科普...
Theatmospherewelivein,theairwebreatheeverydayconsistsof79%Nitrogen,21%Oxygenandtracesofothergases.Butonlyoxygenisvitalandessentialtohumanbeingsforrespiration/survival.Withoutsufficientoxygen,i.e.ifoxygenlevelfallsbelow16%,wewilldieofasphyxiation.我们居住的大气环境中，我们每天呼吸的空气中含有79％的氮气，21％的...
NITROGEN IS ALL AROUND US, making up 78% of the air we breathe, yet we do not notice its presence; an atmosphere of 100% nitrogen, although nontoxic, is fatal. Leguminous bacteria, living in the root nodules of plants such as clover, have an advantage over other living things, as they...
an element, a type of gas making up nearly four-fifths of the air we breathe. nitrógenoˈnitrate noun any of several substances containing nitrogen often used as soil fertilizers. nitrato Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd. nitrogen→ nitrógeno Multilingua...
Nitrogen is the main constituent of the air we breathe. Increased nitrogen concentrations in air may cause asphyxiation, but mainly because it results in a lower oxygen concentration. We mainly absorb nitrogen as proteins. These cannot be stored and are therefore directly converted to energy when ...
The gas we breathe is made up of nitrogen and oxygen. Oxygen is represented by the symbol O. What is the symbol for nitrogen? A. N B. S C. P D. C 相关知识点: 试题来源: 解析 A。本题考查常见化学元素氮的英文符号。选项 B 是硫的符号,选项 C 是磷的符号,选项 D 是碳的符号。只有...