the other substance D. others substance 相关知识点: 试题来源: 解析 B substance作“物质”讲时是可数名词。句意:一种物质如果没有和其他的物质混合,它就是一种纯的物质。根据语境可知,这里的“物质”应该是泛指而不是特指。所以,A、C两个选项都不对。而D项的表达本身就是错误的。反馈 收藏 ...
A. the other substances B. other substances C. the other substance D. others substance 相关知识点: 试题来源: 解析 B substance作“物质”讲时是可数名词。句意:一种物质假如没有和其他的物质混合,它确实是一种纯的物质。依照语境可知,那个地点的“物质”应该是泛指而不是特指。因此,A、C两个选项都...
百度试题 结果1 题目It's not a pure substance, () it is made of different substances.A.lthoughB.ecause 相关知识点: 试题来源: 解析 B 反馈 收藏
1. You are given two unlabeled bottles, each of which contains a colorless liquid. One contains hexane and the other contains water. What physical properties could you use to identify the two liquids? Determine whether the statement is a pure substance or mixture...
5 A pure solid substance is heated into a liquid from 30 C to 90 C. The substance has a melting point of 60 C. The heating curve of the substance on the temperature-time graph is shown in Fig. 5.1.temperature/℃908070)+X Y6050+40+30time / min Fig. 5.1(a)Describe the differenc...
this is the principle this is the pure engl this is the service o this is the taskbar-a this is the time when this is the true this is the word that this is whats she has this is xiao fu speak this is this isnt addressed t this isnt tango this is this just felt this just makes...
true people and frien true pure land true randomness demon true rule true sensitivity true she true steppe true surfaces true tensile strength true vipers true white emulsion true-zero-offsetraypa truebill truebred trueconjugate trueexit truelink technology a truemap truemeter truenight trueorbit tru...
Is salt a pure substance? What is natrium chloride? What is the chemical formula of iodized salt? What is an acid compound? What is the formation of an ionic compound? What is the chemical formula for the ionic compound calcium chloride?
这结合以加速的“湿outperformance与一部透明影片的组合,做它理想为介入高清晰标记的应用 [translate] a亚洲渔业水产与养殖论坛 Asian fishery aquatic product and cultivation forum [translate] aThe molecule is the smallest particle of a pure substance 分子是一种纯净的物质的最小的颗粒 [translate] ...
A pure substance is any single type of material that has not been contaminated by another substance. Water is considered a pure substance if the water contains only hydrogen and oxygen. Other examples include gold, silver and salt. In chemistry, a pure substance has a definite composition. It...