一、 写出画线词语的汉语意思。1. Air is a mixture, not a compound of gases.2. I need to buy a new computer monitor.3. The monument was built in memory of George Washington, the first President of the United States. 相关知识点: 试题来源: 解析 1.混合物 2.显示器 3.纪念碑 ...
解析 答案: mixture.考查首字母填空,根据句意:空气是混合物,不是气体混合物.mixture是名词"混合物"是可数名词,因为不定冠词a, 所以此处天mixture. 结果一 题目 Air is a ___ (混合物),not a compound of gases. 答案 答案:mixture.考查首字母填空,根据句意:空气是混合物,不是气体混合物.mixture是名词"...
题目In chemistry, a mixture is different from a ___. A. compound B. element C. atom D. molecule 相关知识点: 试题来源: 解析 A。在化学中,混合物不同于化合物,“compound”是化合物,“element”是元素,“atom”是原子,“molecule”是分子。反馈 收藏 ...
Mixtures Definition - A mixture contains two or more elements or compounds that are not chemically combined together. To learn about Homogeneous and Heterogeneous mixtures click here.
aOrcein is a compound mixture consisting of ∼14 related small molecules23 that has been used as a food coloring since the Middle Ages. 苔红素是使用了作为食用色素从中世纪的一个复合混合物包括的∼14相关的小molecules23。 [translate]
百度试题 结果1 题目7)Air is aof elements.A.mixtureB. compound C. atomD. material 相关知识点: 试题来源: 解析 7)A 反馈 收藏
百度试题 结果1 题目3. Air is a mixture (mix), not a compound of gases. 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
百度试题 结果1 题目3. Air is amixture(mix),not a compound of gases. 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
What is a Mixture... in terms of Chemistry ? Matter can be classified in various ways according to its structure, behaviours andphysicaland chemical properties. The main classifications of matter include the categorieselementandcompound, either of which may also be called asubstance(which is a le...
The substance that has a fixed composition is called a _. A. mixture B. solution C. compound D. element 相关知识点: 试题来源: 解析 C。有固定组成的物质叫化合物。选项 A 混合物没有固定组成;选项 B 溶液是混合物;选项 D 元素是单质,不是化合物。反馈 收藏 ...