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 ...
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两个选项都不对。而D项的表达本身确实是错误的。
It's not a pure substance, () it is made of different substances. A.lthough B.ecause 点击查看答案手机看题 你可能感兴趣的试题 判断题 当铁芯移动到使接触片闭合位置时,吸引线圈被断路,失去作用 正确 错误 答案:错误 手机看题 不定项选择 采用经典算法进行潮流计算时,通常输电线路采用π型 等值电...
So, is copper a pure substance or a mixture?Yes, copper is a pure substance as copper has definite properties. It is made up of only one kind of atom. A substance having one or more atoms in the same proportion throughout the substance is a pure substance. It is a d-block metal wi...
5 A pure substance has a boiling point of 70 C. The substance is heated from 30 C until the temperature is 90 C.(a)On Fig. 5.1, sketch a graph to show how the temperature of the substance changes with time as it is heated from 30 C to 90 C.[2]9080-70temperature/C6050403020...
carbon amorphous carbon and certain al carbon and sulphur me carbon arc carbon bed carbon bisulfide carbon bisulfidecarbo carbon black charcoal carbon cluster carbon current collec carbon dioxide conten carbon dioxide emissi carbon dioxide narcos carbon disulphide a a carbon fiber composit carbon fiber sh...
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What is the osmolarity of a 0.45M glucose solution? Is the absorption of glucose in the bloodstream a catabolic reaction? Where do the carbon atoms in glucose come from? Does fruit sugar act different than processed sugar in the body?
Is a diamond classified as a pure substance, a pure element, a homogeneous mixture, or a heterogeneous mixture? Mixture: A mixture is stated as a type of physical combination that comprises substances whose identities are retained. These substances can be ...
Pure compounds and elements differ from mixtures in one key way: the substances in a pure compound are held together by chemical bonds. These chemical bonds cannot be broken. Since they contain a single substance only, elements cannot be decomposed by ordinary chemical methods, such as the appli...