What can polluted water contain? A. Nutrients. B. Oxygen. C. Harmful chemicals. D. Clean water. 相关知识点: 试题来源: 解析 C。解析:文中提到“Polluted water can contain harmful chemicals, heavy metals, and pathogens.”。 反馈 收藏
A. To make water dirtier. B. To add more contaminants to water. C. To purify water and remove contaminants. D. To waste water. 相关知识点: 试题来源: 解析 C。解析:“Chemicals are used to purify water and remove contaminants.”说明了在水处理中化学物质的作用。反馈...
What are the three states of matter for water? What does a weak acid do in water? What produces hydronium ions in water? What chemical element is Sb? Which are two chemicals used to purify water? What elements are in salt? What is formed when chlorine reacts with hydrogen?
What-chemicals-combine-together-to-form-water网络什么化学元素化合成水 网络释义 1. 什么化学元素化合成水 化学元素... ... 5. What chemicals combine together to form water? 什么化学元素化合成水? 化学元素1. chemical element ... www.iciba.com|基于2个网页©...
百度试题 结果1 题目Look! Some chemicals are into the water. What may happen? (mixture) 相关知识点: 试题来源: 解析 mixed 反馈 收藏
Chemicals such as chlorine have been used to treat our drinking water for more than a hundred years. Today, chemical disinfection is considered the essential and most direct way to inactivate or destroy pathogenic and other microbes in drinking water. However, it is equally important to ensure ...
Many cleaning products we use at home contain chemicals that help remove dirt and stains. Modern chemistry helps us understand how these substances work and how to use them safely. Cooking or Baking We use chemical reactions to transform ingredients into delicious meals when we cook. Baking, for...
have undertaken a study about which chemicals (化学物质)in reusable plastic bottles go into the water.They let water sit for 24 hours in new bottles,in used bottles and in bottles that had just come out of a dishwashing machine.After that,they compared what they found in...
Nicotine and other chemicals in cigarettes and cigars can cause lung damage. Ask your healthcare provider for information if you currently smoke and need help to quit. E-cigarettes or smokeless tobacco still contain nicotine. Talk to your healthcare provider before you use these products. Go to...
(1)A.推理判断题。文章第一段说明了人们对化学杀虫剂和人工化肥从当初的接受到认识到它们对人类健康及土壤的危害,第二段和第三段讲述了什么是有机农业及其好处。根据文章第二段及第三段所述"Organic farming is simply farming without using any chemicals.Organic