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。
【题目】Carbon DioxideCarbon dioxide is a compound in which two oxygen atoms are connected to a carbon atom.At normal temperatures it is a colourless gas. Carbon dioxide is an important part of the carboncycle and essential for life on Earth. _1 Plants use the sunlight and take up the ...
百度试题 结果1 题目Carbon is a(n) ___ while carbon dioxide is a compound. A. material B. 。 substance C. agent D. 。 E. lement 相关知识点: 试题来源: 解析 d 反馈 收藏
即学活用Carbon is an element, while carbon dioxide is a compound.译: 答案 carbon 碳;element 元素;carbon dioxide 二氧化碳;compound 化合物。碳是一种(化学)元素,而二氧化碳则是一种化合物。 结果二 题目 即学活用Carbon is an element, while carbon dioxide is a compound.译: 答案 carbon 碳;el...
瑞鸿网词典双语例句Carbon is an element, while carbon dioxide is a compound.碳是一种(化学)元素, 而二氧化碳则是一种化合物.
百度试题 结果1 题目Carbon is___, while carbon dioxide is a compound.相关知识点: 试题来源: 解析 an element 反馈 收藏
百度试题 题目Carbon is___,while carbon dioxide is a compound.相关知识点: 试题来源: 解析 an element null 反馈 收藏
Disclosed is a carbon dioxide absorbent formulation comprising: a pharmaceutically acceptable hydroxide essentially free of sodium, potassium and barium hydroxides; calcium and/or magnesium chloride; a hardening agent; and a non-film-forming binding agent.クラーク,マイケルジョン...
Mixtures Definition - A mixture contains two or more elements or compounds that are not chemically combined together. To learn about Homogeneous and Heterogeneous mixtures click here.
of a solution of 224 g (1.65 mol) of potassium hydrogensulfate in 1.5 L ofwater. The acidification is accompanied by copious evolution of carbon dioxide. The turbid reaction mixture is thenextracted with four 400-mL portions of ethyl ether. The combined organic layers are washed twotimes with...