1.something used for or regarded as representing something else, esp. a material object representing something immaterial; emblem or sign. 2.a letter, figure, or other conventional mark designating an object, quantity, operation, function, etc., as in mathematics or chemistry. ...
A. hydrogen peroxide B. hydrogen oxide C. water D. carbon dioxide 相关知识点: 试题来源: 解析 C。在化学中,符号“H₂O”代表水(water)。A 选项 hydrogen peroxide 是过氧化氢;B 选项 hydrogen oxide 表述不准确;D 选项 carbon dioxide 是二氧化碳。
百度试题 结果1 题目The symbol for hydrogen in chemistry is ___. A. H B. He C. O D. N 相关知识点: 试题来源: 解析 A。在化学中,氢的符号是 H。B 选项 He 是氦;C 选项 O 是氧;D 选项 N 是氮。所以选 A。
computational chemistry and represents and warrants to the licensee that it is not a competitor of ...
The chemistry teacher asked Lucy to tell her which symbol ___ oxygen. A. pushes for B. stands for C. searches for D. cares for 相关知识点: 试题来源: 解析 B 【详解】 句意:化学老师让露西告诉她哪个符号代表氧。 考查动词短语。pushes for推动;stands for代表;searches for寻找;cares for照顾。
1.A conventional sign serving as an abbreviation. See also:conventional signs. 2.In chemistry, an abbreviation of the name of an element, radical, or compound, expressing in chemical formulas one atom or molecule of that element (for example, H and O in H2O); in biochemistry, an abbreviati...
If you’d like to learn more about math mode, we have a short explanationhereand for a more general overview of writing math in LaTeX, check outLearn LaTeX in 30 minutes—in particular, the sectionAdding math to LaTeX. If you add one of these symbolsoutsideof math mode, you will see...
6. (Science: chemistry) An abbreviation standing for the name of an element and consisting of the initial letter of the latin or new Latin name, or sometimes of the initial letter with a following one; as, C forcarbon, na forsodium(natrium), fe for iron (Ferrum), sn for tin (stannum...
calculator volume calculator volume of a cylinder calculator z score calculator variance calculator more physics calculators power calculator voltage drop calculator chemistry calculators molarity calculator commerce class 11 commerce syllabus class 11 accountancy syllabus class 11 business studies syllabus class ...
The research team also had two in-depth interviews with Han Tianzheng from Shell in China andWangYangfromInstitute of Coal Chemistry of China. unesdoc.unesco.org unesdoc.unesco.org 同时调查人员还对S h e l l中国煤气化与天然气 公司以及中国科学院山西煤化所王洋教授进行了访谈。