aIn some countries young people are encouraged to work or traved for a year betwen finishing high school and starting university studies 在某些个国家青年人被鼓励工作或traved一年在精整高中和开始大学研究之间[translate] aIt is hard to explain how is a chemical change 解释是坚硬的怎么是化学变化[tran...
问一题英文选择题It is hard to explain in words ___.A What is a chemical change B what a chemical change is C how is a chemical change D how a chemical change is 为什么,选B,我想请大家给我分析一下,首先我想知道,为什么
百度试题 结果1 题目用括号中所给单词的适当形式完成句子How can you tell whether it's a change or a chemical one? (physics) 相关知识点: 试题来源: 解析 physical 反馈 收藏
根据最后一段第二句“It also helps people make new things like medicines to keep us healthy and materials to build houses.(它还帮助人们制造新东西,比如药物来保持我们的健康和建造房屋的材料。)”可知A、B正确;根据第三段第三句“For instance, when you light a candle, the wax (a type of matter...
Summarize the points made in the lecture, being sure to explain how they challenge specific points made in the reading passage. 生词表 Marine animals - 海洋动物 Extinct - 灭绝 Fossil remains - 化石遗迹 Primitive arthropods - 原始节肢动物
SIGNS of a CHEMICAL REACTION (aka a CHEMICAL CHANGE) a GAS is produced a TEMPERATURE change temp heat EXITS reaction--EXOTHERMIC These reactions ABSORB heat! Barium hydroxide (Ba(OH)2) mixed with ammonium chloride (NH4Cl)… HEAT + Ba(OH)2 + 8 H2O + 2 NH4Cl → 2 NH3 + 10 H2O + BaC...
(a) Ammonium nitr... 02:37 How do you distinguish metals and non - metals with respect to electro... 02:39 Write the electronic configurations of the following elements. (a... 02:13 Explain the following of sodium chloride. 02:53 Write the symbols of the following elements. (a) ...
and Couso’s (2017) definition of a model which is a “small number of big or core ideas (Harlen 2010) that have the potential to explain a lot of different phenomena (Izquierdo-Aymerich and Aduriz-Bravo 2003), such as the particle model of matter” or, indeed, the chemical change ...
The model is used to explore the strategies needed to avoid phase separation in continuous and batch reactions. At a given temperature, a batch reactor may need to be run under much higher pressures than a flow reactor if single-phase conditions are to be preserved throughout the course of ...
She tried to explain to him what snow was, but Afel didn’t really understand. Sometimes there was rain where he lived, but not very much, so it was very difficult for him to understand what this cold, ice rain that his mother described was. It didn’t matter. Even when he was only...