解析 C。解析:化学变化是产生新物质的变化。A 改变物质颜色可能是物理变化,如颜料混合。B 冰融化是物理变化,状态改变。C 燃烧木材产生新物质,是化学变化。D 压扁易拉罐是物理变化,形状改变。本题考查对化学变化概念的理解,涉及词汇有 chemical change(化学变化)、substance(物质)等。
A. In the case of B. In case C. In case of D. In event of 相关知识点: 试题来源: 解析 A in case of sth.:假使,如果;in case:以防,万一;in event of:如果,以防;三项都不符合题意。in the cause of意为“在,,过程中”。句意:在化学变化中一种新物质生成了。反馈...
___a chemical change a new kind of substance is formedA.In the case ofB.In caseC.In case ofD.In of的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一键将文档转化为在线题库手机刷题,以提高学习效率,是
解答一 举报 A句意:在化学变化中,一种新的物质生成了.in the case of:至于…,在……的情况下,就…来说,就……而言,对……而言 It's the kind of story we think of as myth.But in the case of Lincoln,the story is true.我们... 解析看不懂?免费查看同类题视频解析查看解答 更多答案(2) ...
Izquierdo, MerceSolsona, N. What is conserved in a chemical change? Opinions of secondary school pupils. in Proceedings of the Third International Seminar on Misconceptions and Educational Strategies in Science and Mathematics. 1993. Ithaca, New York: Cornell University....
解析 substance【答案】substance【核心短语/词汇】substance:物质【翻译】在化学变化中,总是有新的物质形成。【解析】根据题干要求,本题需要表达“在化学变化中,总是有新的物质形成”这一语义。“物质”的英文是“substance”,根据句意,这里用单数。因此本题答案是“substance”。
A chemical change is different from a physical change because in a chemical change ___. A. the appearance changes B. the composition changes C. the size changes D. the weight changes 相关知识点: 试题来源: 解析 B。化学变化与物理变化不同在于化学变化中物质的组成发生了变化。反馈 ...
Chemical Change: A chemical change occurs when two or more substances are combined, atoms are rearranged, and a new substance is formed. For example, when you combine hydrogen and oxygen in the correct amounts, water results. Answer and Explanation: ...
“LifeHeat” —a self-heating life jacket. After several experiments (实验), Liam and Fraser came across calcium chloride (氯化钙): a chemical (化学品) that creates heat when touching water. The boys put the chemical into a small bag, which can be glued to the inside of a common life...
a physical change B. a chemical change C. a change of state D. a change (2) The dissolving of salt in water is ___. [ ] A. a physical change B. a chemical change C. hydrogen and oxygen D. breaking up (3) The change of the three states of water is ___. [ ] A. a chem...