A. Silicon atoms. B. Carbon atoms. C. Oxygen atoms. D. Hydrogen atoms. 相关知识点: 试题来源: 解析 B。解析:文章中明确提到“Graphene is an extremely thin and strong material. It is made up of a single layer of carbon atoms arranged in a hexagonal lattice.”,石墨烯是由一层碳原子组成...
百度试题 结果1 题目( )13. Is oxygen(氧气) the only gas helps fire burn?D A. it B. what C./ D. that 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
A. becauseB. forC. asD. because of ()4. —Why do you plant so many trees around your house? —Because trees can___ CO2. A. turn intoB. burn upC. give outD. take in ()5. —I think CO2is___ CFCs, isn’t it? —Yes, you’re...
This place is wonderful. We enjoyed delicious vegetarian meals, all made with local produce by loving Quechua people. You can’t go to Peru without visiting historic Machu Picchu. The “road” up to the ruins is made up of an endless series of switchbacks (急转弯), resulting in cold ...
what are the first most abundant elements of the universe? i'm just wondering... this site is useful thanks :) Bylittlecircle— On Oct 14, 2007 What types of ions is oxygen likely to form? All The Science, in your inbox Our latest articles, guides, and more, delivered daily. ...
Is oxygen the only gas ___ helps fire burn?A that B / C which D what 相关知识点: 试题来源: 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...
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,关系词只能用that。故选D项。结果一 题目 Is Oxygen the only gas ___ helps fire burn?A.itB.whichC.whatD.that 答案 D相关推荐 1Is Oxygen the only gas ___ helps fire burn?A.itB.whichC.whatD.that...
Step-by-Step Solution:1. Determine the Percentage of Oxygen in Air: - The composition of air is made up of various gases. The most significant component is nitrogen, which makes up about 78% of the atmospher
The vast majority of the Earth's atmosphere is made up of a small number of chemical elements, with much smaller traces of other chemical and organic...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your ...
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。