ACabbr.(=alternating current)交流电abbr.(=actinium )元素锕abbr.(=air-conditioning )空气调节Acolas阿科拉

1. They are acrylaldehyde hydration, ethylene oxide formylation and biological zymolysis methods.
   即丙烯醛水合法，环氧乙烷甲酰化法，生物发酵法。