【解析】答案:D 核心短语/词汇:by volume:按体积计 句子译文:空气一种气体混合物,其中氧气按体积 算占其中的21%。 解析: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 2 1% by volume of air(氧气按体积占空气的2 1%),of表...
8 Which one of the following statements best supports that air is a mixture? A Air contains different elements. B Air is slightly soluble in water. C The oxygen in the liquid air is easily removed during fractional distillation.The water vapour has a fixed composition by mass. 相关知识点:...
Which of the following is a mixture? Why? (a) Water (b) Air (c) Ammonia (d) Methane Mixtures In chemistry, a mixture is defined as the combination of two or more substances. The substances must retain their individual chemical identities in order for the combina...
Area the week set of work clothes, we attain in the shop to order. [translate] askeleton in which exist a binary gas mixture (air + water vapour) [translate] 英语翻译 日语翻译 韩语翻译 德语翻译 法语翻译 俄语翻译 阿拉伯语翻译 西班牙语翻译 葡萄牙语翻译 意大利语翻译 荷兰语翻译 瑞典语翻译 ...
Apparatus comprising a burner (2) of the type to which a substantially stoichiometric fuel/air mixture is supplied, a flow duct (3) accomodating said burner consisting of a feed duct (4) for combustion air and a discharge duct (5) for combustion gas, a gas line (7) opening out into ...
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 ...
Which statement best supports the fact that air is a mixture and not a compound? B A Air contains different elements. B Air can be separated by physical methods. C The composition in air remains constant throughout the world D The water vapour is a chemical compound. 相关知识点: 试题来...
which of the following is a mixture ? salt,Air,Water,Alum,sugar 02:11 Name one metal and non - metal which exist as liquids at room te... 01:39 name a metal which is soft and a non-metal which is hard. 00:58 Name a non-metal which is a good conductor of electricity. 01:27...
Which of the following is an example of a homogeneous mixture? a. air b. orange juice with pulp c. raw milk d. marble Mixtures: When two or more chemical species are mixed together without affecting their chemical integrity, a mixture is f...
威斯康辛kerry黏附邮票并且写地址信封[translate] ahigh discrepancy—strong mitigation 高差误强的缓和[translate] aIt is an area into which the air-fuel mixture iscompressed and burnd 它是空气燃料混合物iscompressed和burnd的区域[translate]