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...
athose set forth below 下面被指出的那些[translate] aspained spained[translate] aThe best title for this passage is 19th-Century Family . 正在翻译,请等待...[translate] aIt is hard to explain what is a chemical change 解释是坚硬的什么是化学变化[translate]...
BROSNAN, T., When is a chemical change not a chemical change? Education in Chem- istry, 36 (2), 56, 1999.Brosnan, T. (1999). When is a chemical change not a chemical change? Education in Chemistry, 36(2), 56.Brosnan, T. When is a chemical change not a chemical change, Educ....
___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
百度试题 结果1 题目Thiskindofchangeiscalledachemical(化学的)change. 相关知识点: 试题来源: 解析 答案:chemical.形容词chemical作定语修饰名词change.故填:chemical. 我们把这种变化称为化学变化。反馈 收藏
When we heat water, it starts to boil. This is a ___ change. A. chemical B. physical C. natural D. artificial 相关知识点: 试题来源: 解析 B。“chemical”指化学变化;“physical”指物理变化,水加热沸腾是物理变化;“natural”意为“自然的”;“artificial”意为“人工的”。所以选 B。 反馈 ...
Is cutting your hair a physical or chemical change? Is heating hydrous salt to an anhydrous salt a physical or chemical change? Why? Is boiling endothermic or exothermic? How do you calculate freezing point depression? Is evaporation exothermic?
Whenever a chemical change ___, there is a new substance formed. [ ] A.takes place B.takes a place C.takes the place D.took place试题答案 在线课程 答案:A提示: 该题考查短语动词和时态.take place表示“发生”是一短语动词,该句用来说明一物理现象,应用一般现在时态,由主句的一般现在时态,可以...
() a chemical change a new kind of substance is formed .A in the case of B in case C in case of D in event of 这道题选择什么?为什么选择那个选项?还有怎样翻译题目?翻译的时候注意什么?