Jiaozi and rock sugar: 12+6= 18 (molecular)

About 10 minutes later: 3/4.

A:

Among them, jiaozi, the rock sugar, accounts for three quarters of a plate.

Analysis: First, find out how many * * * are used as denominators in a plate. Add up the required amount of jiaozi and rock sugar to make molecules. Finally, cut the point and get the answer.