48. According to this research, what size of plates should be used for people who are on a diet? (A) It does not matter (B) Big ones (C) Medium ones (D) Small ones

49. Which of the following descriptions is NOT true? (A) People make judgments about food before eating. (B) Cheese on a fork tastes saltier than the one on a knife. (C) The results reported in this passage are supported by real experiments. (D) Restaurants can improve customers’ eating experience based on the research results.