T:Boys and girls, today we will travel from China to theUSA. Now every group has a plane. If you do a good job, you can fly one step;
解释这节课的评价方式，每个小组一架飞机，从中国出发途经几个国家，表现好的小组就可以飞。
youdao
应用推荐
模块上移
模块下移
不移动