A. How Bottled Water Originated B. “Taking the Waters” Has Been Practiced for Long C. What’s the Safe Alternative to Tap Water D. Why Bottled Water Sales Increase 相关知识点: 试题来源: 解析 D 解析 主旨大意题。文章第一段的最后一句“What accounts for this surprising increase in demand...
How much Americans spent in 1995 on bottled water; Americans suspicious of claims concerning the safety of the water supply; No guarantee that bottled water is a safer alternative to tap water; What contaminants might be in your water; Suggestion that all Americans test their water. INSETS: ...
If the water is collected through a hole drilled into the source, it has to have exactly the same composition as the water in the surface spring. Well water: Well water is drawn from a protected well that taps directly into an unconfined aquifer. Of the basic types of bottled water, the...
The FDA does not consider bottled water to be a risky food product for at least a couple of reasons: First, since the water's source must be protected in the first place, the water shouldn't be susceptible to many of the harmful contaminants found in surface and ground water, which muni...
Testing Deionized Water The most effective way to determine the quality of purified water is byperforming a resistivity and conductivity test using a conductivity / resistivity probe. Deionized water should have a resistivity of 18.2 million ohm-cm (18.2 mega-ohm) and a conductivity of 0.055 micro...
If a TDS meter suggests contamination, it’s probably safe to bathe and launder clothes with, but you should switch to bottled for drinking and cooking while you arrange a water test. Some problems, especially with municipal water, are only temporary. Other issues may require ahome water filtra...
of how it is so ,the popularity of bottled water taps into our desire for better health,our wish to appear cultivated and even a longing for lost purity 不管怎样它如此是,被装瓶的水轻拍大众化到我们的更好的健康的欲望,我们的愿望里看上去耕种和甚而渴望丢失了纯净 [translate] 英语翻译 日语...
After 24 hours, check if the water still has chlorine. To test for the presence of chlorine, fill a test tube with water from the bucket and add 5 drops of orthotolidine (OTO –find it here). If the color of the water changes to yellow, the water still has chlorine. Leave it for...
Pepsi began test-marketing Aquafina, its brand of filtered bottled water, in late 1994, and a few years later rolled it out nationwide with a huge marketing campaign. Coke resisted following at first, preferring to promote consumption of its soft drinks over an alternative that might cannibalize...
What is the average level of TDS water? The RO or reverse osmosis process results in TDS under 25 ppm that is distilled and reduces TDS to 10 ppm. Bottled mineral water has a TDC of 400-650 ppm. Can we drink water with a TDS of 400 ppm? Though the upper limit of TDS water is...