Hydrogen and oxygen,( ) ,are gasesA.such as B for example Cfor an instance Dtake for example要理由

Water＿＿(contain)oxygen and hydrogen. Hydrogen and oxygen c___ to form water Water is made up of hydrogen and oxygen? 改为同义句 water consists of hydrogen and oxygen water ____ ____ _____ ____hydrogen and oxygen注意有4格 gas是可数名词和不可数名词?a smelly gas Hydrogen and oxygen are gases.氢和氧是气体。 The two elements _____water is made are th oxygen and hydrogen.A thatB whichC of whichD with which Hydrogen and oxygen,( ) ,are gasesA.such as B for example Cfor an instance Dtake for example要理由 His colleague can split water into hydrogen and oxygen when_____（place) into a bucket of water这里为什么填placed呢?为什么it is 没有了? Breaking up water into oxygen and hydrogen is a chemical change.为什么change不是changing?当change不当谓语动词时是不是就应该改为changing? of which 做什么成分The two elements of which water is made are oxygen and hydrogen.The two elements of which water is made 主语 也是从句 are 谓语 oxygen and hydrogen 宾语 water is (made of) two elements 这么看 of which 做状语从 求《The element song》元素周期表之歌mp3版!歌词：There's antimony, arsenic, aluminum, selenium,And hydrogen and oxygen and nitrogen and rhenium,And nickel, neodymium, neptunium, germanium,And iron, americium, ruthenium, uranium,Europium, Combustion of a 0.9835-g sample of a compound containing only carbon,hydrogen,and oxygen produced 1.900 g of CO2 and 1.070 g of H2O.a.What isthe empirical formula of the compound? 光合作用暗反应的英文定义?光合作用分光反应和暗反应light reaction:reactions in which light excites electrons and water splits into hydrogen and oxygen during photosynthesis光反应的能找到?但是暗反应的是什么?dark r hydrogen hydrogen 英文化学题,求解A sample of an unknown biochemical compound is found to have a percent composition of 40.45 percent carbon, 7.92 percent hydrogen, 15.73 percent nitrogen and the balance oxygen. What is the simplest formula for this compound THAT不能引导定语从句吗The two elements（ ）water is made are the gases of oxygen and hydrogen.我觉得空白处写THAT答案是WHICH请知者辨析下,谢谢啦 轮机英语,However fast or slow the combustion rate,it is still a _______ between carbon,hydrogen.sulph and oxygen that releases heat.A.physical deformationB.state exchangeC.chemical reactionD.coalescence