acid test ratio ,gearing ratio 的意思?formula?

acid test ratio ,gearing ratio 的意思?formula? 什么是Gearing Ratio? 求教current ratio 和 acid-test ratio 有什么区别啊? acid test的意思 烦请帮忙告诉liquidity ratio,current ratio,acid ratio怎么算? rehydration ratio什么意思 ratio是啥意思 digit ratio是神马意思 reserve ratio” reserve ratio tertiary gross enrollment ratio 啥意思? strenth-to-weight ratio什么意思?