【题文】 Carbon is a chemical element which is present in organic compounds that make us organisms, plants as well as fossil. It is a vital component of the greenhouse gas CO2, the highest percentage of the global warming gas in the atmosphere. These Green House Gases (GIIGs) along with...
An elephant is a mammal.The elephant is a mammal.Elephants are mammals.With uncountable nouns, there is only one option – the “zero article”:Carbon is an element.So far so good. But your example with fruit somewhat complicates things, since fruit has two plural forms: the more common ...
【题目】阅读理解Carbon is a chemical element which is present in organic compounds that make us organisms.plants as well as fossil. It is a vial component of the greenhouse gas CO2, the highest percentage of the global warning gas in the atnosphere.These Green House Gases (GlIGs) along ...
Carbon's discovery is lost to history. The element was known to prehistoric humans in the form of charcoal. Carbon as coal is still a major source of fuel worldwide, providing about 37% of the world's electricity, according to the World Coal Association. Coal is also a key component in...
Carbon is an element. Charcoal is concrete. Scientific names: carbon black, silica. Silica: Named based on its function as carbon black. It is incorrect to use the term silica to refer to a white substance with carbon black properties. ...
百度试题 结果1 题目9. Carbon is an element (成分) found in many things. 相关知识点: 试题来源: 解析 答案见上element 反馈 收藏
The enormous existence of carbon in numerous forms is attributed to two of its properties: • Tetravalency • Catenation Tetravalency: Carbon forms covalent compounds by sharing electrons and these compounds are very stable as the bonds involv
A. material B. substance C. agent D. element 相关知识点: 试题来源: 解析 D 正确答案:D 解析:element n.(化学)元素;成分,要素material n.材料,原料;素材,资料。substance n.物质;实质;要旨,基本内容;根据,理由。agent n.代理人,代理商;(化学)剂。反馈...
The utility model provides a discharge end sets up L shape roll -over stand that carbon element factory is with carbon piece tipping device, carbon piece roll table machine L shape roll -over stand sets up the cuboid subframe perpendicularly and constitutes on one side of the cuboid body ...
Is carbon monoxide classified as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? Explain.Elements, Compounds, and Mixtures:An element is a pure substance made up of atoms with the same atomic number. A compound is a pure su...