Kensal E. van HoldeSpringer Berlin HeidelbergDecker, H. & Van Holde, K., E. 2011, "Oxygen, Its Nature And Chemistry: What Is So Special About This Element?" in Oxygen and the evolution of life, Springer, Berlin; Heidelberg; New York, pp. 1-18....
Is Oxygen the only gas ___ helps fire burn? A. it B. which C. what D. that 相关知识点: 试题来源: 解析 [答案]D [解析] [详解]考查定语从句。句意:氧气是唯一能让火燃烧的气体吗?本句是限定性定语从句,从句修饰名词 the only gas,the only gas是物体,名词被the only修饰时,关系词只能...
解析 A核心短语/词汇:help sb./ sth. (to) do sth. 帮助某人/某物做某事句子译文:氧气是唯一的助燃气体吗? 本题考查定语从句。___helps fire burn 用来修饰之前的名词gas, 该从句的引导词在定语从句中做主语,不能省略,先行词有only 修饰时不能用which; what 不能引导定语从句,故选项A符合题意。反馈...
A.that B./ C.what D.it相关知识点: 试题来源: 解析 A 考查定语从句。Gas为先行词,在定从___ helps fire burn中作主语,且that作主语时不可省略。所以选A。 分析总结。 gas为先行词在定从helpsfireburn中作主语且that作主语时不可省略反馈 收藏 ...
A. It is a product B. It is a reactant C. It is a catalyst D. It has no role 相关知识点: 试题来源: 解析 A。中文解析:氧气在光合作用中是产物,光合作用利用二氧化碳和水产生葡萄糖和氧气,选项 B 反应物是二氧化碳和水,选项 C 催化剂在光合作用中不存在,选项 D 说法错误。反馈...
Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal,
解析 C 关系代词what在这里引导一个名词性从句作to be的表语,同时what在表语从句中又为is的表语成分,这类语法结构还有,如:Show what you have written.(把你所写的给我们看看)和She is not what she was a few years ago.(她可不是几年前的她了)。其他选项均不能表示这种语法关系。
the element 'oxygen' is part of the mixture 'air' and some of the properties of air are due to the oxygen part - but those properties are generally less strong / intense than those of pure oxygen because of the presence of the other constituents of the mixture called 'air', e.g. ...
For the reaction H_2O_2 (aq) to O_2 (g). What is the oxidation of oxygen in O_2? Give an example of a displacement reaction. What is the oxidizing agent? What is the reducing agent? What element is being oxidized in the following redox reaction?...
第1题 The two elements water is made are oxygen and hydrogen.A、that B、which C、of which D、with which 第2题 The crime was discovered till 48 hours later,gave the criminal plenty of time to get away.A、which B、that C、so D、what 第3题 The International Studies University,in 1951...