单词：anisic acid piperazinium salt
单词：anisic acid piperazinium salt 相关文章
Acid Rain 酸雨 Damage from acid rain is widespread - not just in eastern North America, but throughout Europe, Japan, China, and Southeast Asia. Is the rain that's falling on your umbrella acidic? A listener's question -- on today's Earth and Sky. J
(科普英语)Earth and Sky
Where once only salt miners traveled, today, tourists track through tunnels hundreds of feet deep into the caverns of Zipaquir mountain in Colombia. Their destination, a Catholic cathedral carved from the mineral deposits of the old mine. More than 1
国家地理2007年
How does acid deposition affect human health? We eat food, drink water, and breathe air that has come in contact with acid deposition. Canadian and U.S. studies indicate that there is a link between t
知性英语
我们今天要学的习惯用语都包括这样一个关键词汇，salt。 Salt这个词大家都熟，是盐。人们在生活中少不了它，一切活细胞也都需要它，人们意识到盐的重要性已经有好几个世纪了，所以由s
美国习惯用语
By Birungi Machrine Kampala 26 November 2007 Attacks using acid are becoming more frequent in Uganda. Up to 2003, there were only 145 recorded attacks, but over the last three years, there have already been 87. Survivors often suffer from severe emot
VOA常速英语2007年（十一月）
从柴米油盐说起 中国人用柴米油盐酱醋茶概括了生活所必须的点滴琐事，所以，一说起柴米油盐，说汉语的人头脑中第一印象就是过日子。 其实不只是中国人，全人类又何尝不是如此呢？不同
英文语法词汇