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酸和碱是中学化学课中的常客。美国的老师是怎样向学生解释酸碱概念的呢?我们先来了解一下“酸”吧!Acids are one of the most commontypes of chemical substances.They arefound in many different places.Acids have certain properties.They aresour in taste.Their liquid solutions conduct
Acid and alkali are secondary school chemistry class regulars. Acids are one of the most common types of chemical substances. They are found in many different places. Acids have certain properties. They have a look at the “acid” aresour in taste. their liquid solutions conduct