百度试题 结果1 题目___ is a chemical change. (burn) 相关知识点: 试题来源: 解析反馈 收藏
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) Melting Iron B) Boiling alcohol C) Evaporating Water D) Burning Coal Changes in Matter: Changes in matter can be classified as either physical or chemical change. Physical changes are those that do not involve changes in the chemical composition o...
Is gasoline burning a chemical change?GasolineGasoline is a homogeneous liquid consisting of organic compounds obtained from the distillation of petroleum and sometimes, ethanol and other additives. It is used as fuel in vehicles. The United States uses just over 40% of the total gasoline used ...
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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. Wax turns into water B. Wax combines with oxygen to form carbon dioxide and water C. Wax turns into hydrogen gas D. Wax turns into oxygen gas 相关知识点: 试题来源: 解析 B。解析:蜡烛燃烧时,蜡与氧气发生化学反应,生成二氧化碳和水,这是蜡烛燃烧这个化学变化的本质。选项A蜡不会单纯地变成水...
1. The cross-border passenger service of the China-Laos Railway started in February, 2023. 2. It takes ten hours and a half to travel from Kunming to Vientiane on the cross-border train. 3. The writer introduces three places to visit in Kunming in Paragraph 2. ...
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There is a good reason for this-mammals have the ability to keep their body at a constant temperature whatever the weather.They are “warm-blooded”. Mammals achieve this by chemically “burning” their food as fuel inside their bodies.This is kept under tight control by a region of the br...