题目

   Fish and chips, and Chinese take-away food(熟食) are very popular in England. But they are less popular(不受欢迎)in the USA. In the USA, they eat take-away food, too. like fried(油炸的)chicken .But the most popular kind of take-away food is hamburgers .It looks like bread with meat in it. Hamburgers are delicious. They are very popular in the world .Chinese food has different tastes and is usually very delicious. It’s also very popular in the world.  根据短文内容，选择最佳答案。    (    ) 1. What’s the most popular food in the USA?         A14．已知AB是过抛物线2x2=y的焦点的弦，若|AB|=4，则AB的中点的纵坐标为$\frac{15}{8}$．