aA compound is a substance that can be split into two or more elements. Water is a compound because it can be split into its components, hydrogen and oxygen. 化合物是可以被分裂成两个或多个元素的物质。 因为它可以被分裂成它的组分、氢和氧气,水是化合物。 [translate] ...
Water is a compound because it can be split into its components, hydrogen and oxygen.是什么意思?待解决 悬赏分:1 - 离问题结束还有 A compound is a substance that can be split into two or more elements. Water is a compound because it can be split into its components, hydrogen and oxygen....
1、A compound is a substance that can be split into two or more elements. 2、The relevant characteristics of these microorganisms are that they should be nonpathogenic, easy to maintain and cheap to grow. 3、Most mRNAs in bacteria are unstable with half-lives of 2-4 minutesat 50℃. 4....
A substance that cannot be broken down into simpler substances by chemical means is called ___. A. a compound B. an element C. a mixture D. a solution 相关知识点: 试题来源: 解析 B。本题考查化学物质的分类。“an element”意思是元素,不能通过化学方法分解为更简单物质的就是元素。A 选项...
A substance that cannot be broken down into simpler substances by chemical means is called: A. Compound B. Element C. Mixture D. Alloy 相关知识点: 试题来源: 解析 B。“element”(元素)不能通过化学方法分解为更简单的物质。选项 A“compound”是化合物,可以分解;选项 C“mixture”是混合物,不...
A compound is a substance form two or more elements chemically united in fixed proportions.A molecule is a group of atom that can take part in a chemical reaction.
In chemistry, a compound is a substance made up of two or more different chemicalelementscombined in a fixed ratio. When the elements come together, they react with each other and form chemical bonds that are difficult to break. These bonds form as a result of sharing or exchangingelectronsbe...
A substance that cannot be broken down into simpler substances by chemical means is called a(n) ___. A. element B. compound C. mixture D. solution 相关知识点: 试题来源: 解析 A。本题考查化学物质的分类。选项 B“compound”是化合物,可以通过化学方法分解为更简单的物质;选项 C“mixture”是混...
解析:第2段第2句提到“生产含有Olestra化合物的食品的厂商认为使用Olestra能除掉某些食品中的脂肪”,在第6段,作者又指出“Olestra不为肠胃吸收,并能保持脂肪的美味而不对身体产生有害的影响”,因此B与文中所阐述的观点一致;A与文中提到Olestra会阻止人体吸收某些维生素和类胡萝卜素相悖;C、D同样与原文的意思相悖。
A. material B. substance C. agent D. element 相关知识点: 试题来源: 解析 D 正确答案:D解析:element n.(化学)元素;成分,要素material n.材料,原料;素材,资料。substance n.物质;实质;要旨,基本内容;根据,理由。agent n.代理人,代理商;(化学)剂。