一列火车以20米每秒的速度通过一座大桥，火车从上桥到完全通过用了1分钟时间，火车完全在桥上的时间是40秒钟，请问大桥长多少米？

    Going to the zoo

    The students of our School go to the zoo. They see a lot of animals. In the afternoon, they get back to school. The teacher asks them which animal is their favourite. Each student gives an answer. Some animals are very popular. Other animals are not. Here is a chart (图表) the students make at school. It shows the animals the students like best.