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 ...
and found out what chemicals are in them.Many kinds of our medicines today are made from those chemicals. There are som diseases that we can't trear yet. But because of modern medicine, people now live longe than their grandparents.51. From this article, a cold often starts with A A....
A. Pour chemicals into rivers B. Waste more water C. Treat wastewater properly D. Use more pesticides 相关知识点: 试题来源: 解析 C。解析:我们可以通过正确处理废水来减少水污染。选项 A“Pour chemicals into rivers(把化学物质倒入河流)”、选项 B“Waste more water(浪费更多水)”和选项 D“Use mo...
Normally, groundwater does not contain carcinogenic chemicals in significant enough quantities to be considered dangerous. However, radon, a...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough homework ...
The dangers of water pollution include adverse effects to human health, such as the spread of disease or exposure to toxic chemicals, as well as the... Learn more about this topic: Water Pollution | Definition, Sources & Examples from ...
Now, just as rocks are broken down by weathering, the animal and plant residues are broken down, too. They're reduced to simple chemicals by microorganisms in a process called mineralization. And just as some rocks are more resistant than others to weathering, the compounds found in the soil...
It is cut up,mixed with water and chemicals(化学物质)and boiled before it is pressed into new paper.The process includes many steps and uses a lot of energy.So is there a simpler way to deal with solid waste?Yes,there is,It's called upcycling. In recycling,an object is broken down ...
However, all that is known for sure abouthow this mineral is formedis that the circumstances are unique. It was uncovered as a waterworn crystal in alluvium, and based on its composition, researchers believe it originated in pegmatite. Suchigneous rocks are created during the last stage of cr...
A. The chemicals have caused a decrease in the number of fish species. B. The reputation of the Li River has negative effects on the river's water quality. C. The medi a has a good effect on encouraging greater use of clean energy. D. The local government did nothing to protect the...
731.Using a lower temperature to draw out the extract, she found a substance that worked. 通过使用更低的温度萃取提取物后,她发现了一种有效物质。 732.After failing more than 190 times, the team finally succeeded in 1...