A. the wax changes its shape in melting but new substances are formed in burning B. burning is always a chemical change and melting is always a physical change C. the wick disappears in burning but the wax remains in melting D. physical changes are reversible and chemical changes are irreve...
Researchers have established that (引导宾语从句,后边全部是宾语从句部分)when people are mentally(是不是漏了什么词,这半句是宾语从句里的状语成分),bio-chemical changes occur in the brain (宾语从句的主干部分)另外:没有见到您说的it啊 结果一 题目 Researchers have established that when people are ...
However, these simulations do not address long-term recovery from a release or the scenario where a natural disaster or a negligent act by the government or a third party causes the chemical release. Hazardou...
Chemical reactions are processes that occur when substances interact and change into new substances. A chemical reaction can be represented by a chemical equation. For example, the reaction between hydrogen gas (H₂) and oxygen gas (O₂) to form water (H₂O) can be written as 2H₂ ...
it changes because yo it code it could be dangerous it couldve been i did it desktop it develops fairly fa it did enter my mind it didnt occur to me it displayed the zodi it does without sayin it doesnt matter it doesnt hurt when i it doesnt matter abou it doesnt matter it doesnt ...
( )2.Whatmayleadtogreatchangestotheplanet?swatercycle? A.Theriseofglobaltemperatures. B.Thefastdevelopmentofindustry. 30分钟能力强化组合练(十六) 第62页 62 C.Theheavyrainfalloftheearth. D.Theterribledroughtsindryregions. ( )3.WhatisParagraph3mainlyabout? A.Effectsofclimatechange. B.Factsofrainfall...
The π bond on the double bond is not as strong as the sigma bond. Therefore, the π bond is easier to break and undergo various chemical changes when chemical reactions occur. 答案:正确 点击查看答案解析手机看题 你可能感兴趣的试题 单项选择题 直流电动机的额定功率指( )。 A.转轴上吸收的机...
2. Do twins occur from fertilization of two eggs or one egg? Twins can occur from the fertilization of two eggs at once as well as a single egg. When two eggs are fertilized by two different sperm cells, they make fraternal twins (nonidentical). When one egg splits into two after fert...
a5.6.3 化学品发生大量泄漏等紧急情况时,启动化学品应急处理小组,企业负责人组织相关人员讨论存在的问题,制订纠正措施,评估应急措施是否适当,完善工作指引,并按安全监管总局令第21号《生产安全事故信息报告和处置办法》要求报告南山区相关行政主管部门。 正在翻译,请等待...[translate]...
When does soil pollution occur? Pollution Pollution involves the introduction of contaminants within the environment resulting in drastic changes. There are various forms of pollution, such as noise pollution, air pollution, and soil pollution. The causes of these pollutions include; industrialization and...