本题考查定语从句,先行词是air。,本句可分为两个单句: Air is a mixture of gases(空气一种气体混合物),和 Oxygen forms 21% by volume of air(氧气按体积占空气的21%),of表示范围,which代指ai,rin 表示地点或时间,to表示方向,by表示方式,所以答案是D ...
百度试题 结果1 题目请判断译文是否恰当:Air is a mixture of gases.译文:空气是多种气体的混合物。A、正确B、错误 相关知识点: 试题来源: 解析 正确 反馈 收藏
百度试题 结果1 题目Air is a mixture of g ___.相关知识点: 试题来源: 解析 答案:gases.介词后接名词作宾语;gas是可数名词,根据语境要用复数形式。故填:gases。反馈 收藏
结果一 题目 根据句意及首字母提示填空:Air is a m ___of gases 答案 1.答案:Air is a mixture of gases.2.翻译:空气是各种气体的混合体.3.mixture是名词,意思是“混合体/混合物”.相关推荐 1根据句意及首字母提示填空:Air is a m ___of gases 反馈 收藏 ...
Air is a mixture of gases. Which gas is essential for combustion? A. Oxygen. B. Nitrogen. C. Carbon dioxide. D. Hydrogen. 相关知识点: 试题来源: 解析 A。氧气是燃烧必需的气体。B 选项氮气不是燃烧必需的;C 选项二氧化碳不是燃烧必需的;D 选项氢气不是空气中主要成分也不是燃烧必需来自空气。
Air is a mixture of gase(a) Slate the percantage of clean dry air whichis oxygun. Give your answer to the nearesit whole(b) Oxygen and nitrogen are useful gases that can be obtained from ai(c)Carbon dioxide, CO2, is a covalent molecule ...
Air is a mixture of gases that you breathe.You cannot see,smell or taste air but it is around you.Layers of air surround theearth,too,making up the earth''s atmosphere.Oxygen is a gas found in the air ,All animals including humans ,need it to stayaliveNitrogen and oxygen are the two...
百度试题 结果1 题目根据汉语意思完成句子air is amixture of gases.众所周知空气是许多种气体的混合物。 相关知识点: 试题来源: 解析 It is known to all that 反馈 收藏
Air is a mixture of gases ,___ oxygen forms 21% by volume.in which to which by w
18.Air is amixture of gases with a certain quantity of solids and liquids.(mix) 试题答案 在线课程 分析空气是一种有一定数量固体和液体的气体混合物. 解答答案:mixture 根据a___of gases,可知应该用名词形式.mix,动词,混合.名词形式,mixture,混合物.a+可数名词单数,故填:mixture. 点评...