For example, hydrogen can be used as fuel, and it can be combined with nitrogen (氮气) to form new materials necessary for human settlement. Due to these advantages, Mars would be a more successful planet for exploration and settlement because it contains the basic resources necessary for ...
Although most animals cannot use nitrogen in a pure form, they do find it necessary for life, in the form of compounds like amino and nucleic acids. Plants also rely on this element for nutrition, with some plants being well known as nitrogen fixers, meaning that they efficiently trap it ...
六、阅读理解体裁话 题词 数难度建议用时说明文环境保护279★★6 mins A healthy environment is necessary for humans and animals to survive. Drinkable water,breathable air, and edible food are some of the resources that are necessary for life to continue.Here are some ways to save natural resources...
are you sure this is are you talking about are you thinking what are you trying to fin are zoos necessary area amplitude respon area calculator area counting area momnet area of base area of construction area of image area of nozzle throat area of protection area precipitation area ratio of ...
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aNitrogen is an inert gas, but at a high temperature can and file, calcium, magnesium and oxygen. Nitrogen can be liquefied, condensed into liquid nitrogen. Nitrogen so can be applied to oil industry is suitable for physical reasons, its chemical properties, a guaranteed source, low cost. 氮...
carbon-based life on Earth. But the elements are still products of stars and would still be present in planetesimals everywhere. No matter what kinds of life we are looking for, we are likely to find the necessary elements on almost every planet, moon, asteroid, and comet in the universe....
a通货紧缩政策 Outside field market[translate] a这么可怕的事情从未在我们镇上发生过 正在翻译,请等待...[translate] amost kjeldahl nitrogen supplied is available for nitrification. 由供应的多数凯氏法氮气为氮的硝化作用是可利用的。[translate]
No matter what kinds of life we are looking for, we are likely to find the necessary elements on almost every planet, moon, asteroid, and comet in the universe. A somewhat stricter requirement is the presence of these elements in molecules that can be used as ready-made building blocks ...
by carbon-based life on Earth.But the elements are still products of stars and would still be present in planetesimals everywhere.No matter what kinds of life we are looking for, we are likely to find the necessary elements on almost every planet, moon, asteroid, and comet in the universe...