Which of the following is a chemical change? A. Melting ice B. Breaking a glass C. Burning wood D. Crushing a can 相关知识点: 试题来源: 解析 C。燃烧木材是化学变化。选项 A 冰融化是物理变化;选项 B 打破玻璃是物理变化;选项 D 压扁罐子是物理变化。
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...
BROSNAN, T., When is a chemical change not a chemical change? Education in Chem- istry, 36 (2), 56, 1999.Brosnan, T. When is a chemical change not a chemical change, Educ. Chem., 36(2), 56, 1999.Brosnan, T. (1999). When is a chemical change not a chemical change?
The wonders of glass all come down to melting sand. Glass has become so commonplace today that it’s easy to see right through it without a second thought. It’s in our windows, on our screens, in our cabinets, and in many of the devices we interact with every day. Even though glass...
asimile 相似 [translate] 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] ...
___a chemical change a new kind of smaterial is formed.( )A. In the case ofB. In caseC. In case ofD.In event of 相关知识点: 试题来源: 解析 考查介词短语.in the case of:至于…,在……的情况下,就…来说,就……而言;in case 万一,以防;in case of防备; 假如;in event of...
() 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? 答案 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...
There are two kinds of changes—chemical change and physical change. In a chemical change, there is always a new substance(物质) formed. Breaking up water into hydrogen(氢气) and oxygen(氧气) is a chemical change. In each of the chemical change at least one new substance is formed. A ch...
Reuse is the most energy-efficient version of circularity. Collecting, cleaning, and refilling glass bottles was once common and widespread, and it remains a small but significant part of the economy in many countries. It’s also the norm in many places to buy foods in bulk and transport ...
(a) Water boiling (b) Ice melting (c) Rusting of a nail (d) Alcohol evaporating (e) Iodine vaporizing. Physical and Chemical Changes: All changes can be classified as either physical or chemical. When we say...