What is the advantage of this solar-powered water purification method compared to traditional methods? A. It is more expensive. B. It is less efficient. C. It is relatively inexpensive and easy to operate. D. It requires large amounts of E. nergy. ...
A. Making water more polluted. B. Ignoring water purification. C. Playing a vital role in water purification. D. Reducing the need for water. 相关知识点: 试题来源: 解析 C。解析:文章中说化学在水净化中起着至关重要的作用,使用各种技术去除污染物,使水可安全饮用等,所以答案是 C。反馈...
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what is taken for granted是所认为理所当然的(措施)like the setting up of a water purification plant or the administration of a school 这里是like做介词+动名词表示建立水净化厂或学校管理countries which are looking about to solve common problems是定语从句,which are looking about to solve common ...
B. Purification of water. C. Damage to aquatic ecosystems. D. Improvement of soil fertility. 相关知识点: 试题来源: 解析 C。解析:文中提到 Water pollution occurs when harmful substances such as chemicals, waste, and sewage are discharged into water bodies. This can damage aquatic ecosystems ...
What is a water filter? A water filter is a system that removes sediment and contaminants from water so that it looks clearer, tastes and smells better, and is healthier to drink and use for other activities like bathing, cooking, and washing dishes. Often, water filters work by using a ...
Ask The Expert: What to Know Before Investing in an Ultrapure Water Purification SystemTanuja Koppal
Portable air cleaners are generally used to purify the air in just a single room. Combining a fan and one or more of the cleaning devices discussed previously, they are a good option if the room that needs purification does not have access to a central HVAC system or forced ...
Finally, pH is important in chemistry, agriculture, medicine, oceanography, engineering, biology, and water purification. Why Do We Test our Water for Ph? Again, pH is a numerical value that is used to determine if the water is acidic. The water quality regulations specify that the tap ...