log min log am 对双组分溶液可略去下标A、B log 1-xo N in log am对双组分溶液可略去下标A、B m B W A B D A x x x x N log log min                          min 1 log 1 log D W D W m x x x x N                     1 A A N B m B W D x x x x               N A A m B B D W x x x x              