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...
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. it changes shape. B. it melts. C. it produces heat and light. D. new substances are formed. 相关知识点: 试题来源: 解析 D。解析:蜡烛燃烧产生新物质二氧化碳和水等,所以是化学变化。A 形状改变可能是物理变化。B 蜡烛融化是物理变化。C 产生热和光不一定是化学变化。本题考查对蜡烛燃烧是化...
A. a chemical change is always faster. B. a physical change does not change the appearance of a substance. C. a chemical change produces new substances. D. a physical change always requires heat. 相关知识点: 试题来源: 解析 C。解析:化学变化和物理变化的区别是化学变化产生新物质。A 不一定...
百度试题 结果1 题目Chemical (化学) change is a change that produces (生成) ___ substance (物质).相关知识点: 试题来源: 解析 another 反馈 收藏
New Year cake is an essential food prepared for the Chinese New Year. It has a history of over 2,000 years in China and is still popular nowadays. It is steamed food made of rice flour. There are two kinds of New Year cake: the southern style and the northern style. Those made in...
and then click run and then cooking and then double click and then fire shot do and then forsake us and then gradually ex and then heard it and then i believe and then i heard the and then i know just and then i make this and then i see the lo and then it starts ki and then...
i am awakened and my i am being responsibl i am cooking a sponge i am drunk i am filled with them i am going to cook yo i am here for you if i am in love i am in the mood for i am in the pink and i am inaccurate i am invincible i am just like a man i am leak i...
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) ...
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 chemical change B. different substances...