用英文介绍自己的化学学习情况 参考 I am a hard-working am very good at several subjects such as maths,physics and my chemistry is not good because she finds it boring. I also wants t
Green chemistry, also called sustainable chemistry, is a chemical philosophy encouraging the design of products and processes that reduce or eliminate the use and generation of hazardous substances. Whereas environment
Silver is a chemical element with the chemical symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it has the highest electrical conductivity of any element and the highest thermal