A large number of structures of benzene methyl and methylene groups but rare aralkyl ether linkage existed in the waste liquor.

 
  • 兩種廢液木素中都含有大量的苯環(huán)及甲基、亞甲基結構,幾乎不存在烷基芳基醚鍵結構;
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan