Set the volume of a cup of 1,Ming Ming first drank one-half of a cup of juice, and then filled with water; and drank one-half of a cup, which drank 1/4 cup of juice, 1/4 cup of water, the cup is still left 1/4 cup of juice and 1/4 cup of water; and then fill up the water; and finally all finished, that is, drank 1/4 cup of juice, 3/4 cup of water, the whole process*** Drinking Juice:1/2 + 1/4 + 1/4 = 1 cup. Drink water: 1/4 + 3/4 = 1 cup, so drink juice and water are as much as one cup.