托福写作课程(三十七)


时间:2017/9/8
作者:辛达托福代报名小编
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  [edit] Fluoridation around the world

  Main article: Fluoridation by country

  About 5.7% of people worldwide drink fluoridated water; this includes 62.5% of the U.S. population.[10] 12 million people in Western Europe have fluoridated water, mainly in England, Spain, and Ireland. France, Germany, and some other European countries use fluoridated salt instead; the Netherlands, Sweden, and a few other European countries rely on fluoride supplements and other measures.[73] The justification for water fluoridation is analogous to the use of iodized salt for the prevention of goiters. China, Japan, the Philippines, and India do not fluoridate water.[74]

  [edit] Malfunctions in equipment

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