来自MSN7 天
9 Household Items You Should Never Clean With Vinegar
Why Vinegar Is Used for Cleaning. While vinegar serves multiple purposes, it is often used for household cleaning because it ...
Nature17 天
Super-Acid Formation in the Pyridine–Acetic Acid System
A STUDY of the physico-chemical properties of mixtures of pyridine and acetic acid in all proportions ranging from 0 to 100 per cent by various workers and very recently by us 1 showed that the ...