斑马老师在黑板上画了一道弧线,问:“同学们,你们知道这是什么吗?”“彩虹!”“初升的太阳!”“和尚的脑袋!”……大家热闹地嚷着,开心地笑着。“当人们走路遇到河流,要跨到对岸的时候,这条弧线就被人们踩在了脚下,变成了……”“一座桥!”听到老师的启发,大家异口同声地回答。“它们的名字虽然都叫‘桥’,但是相貌却各不相同,请你们瞧一瞧世界名桥。”说着,斑马老师点击鼠标,投影幕上出现了一幅幅各式各样的桥梁图片,“这是1400年前建造的 Zebra teacher draws an arc on the blackboard and asks: ”Classmates, do you know what it is?“ ”Rainbow!“ ”The rising sun!“ ”The monk’s head!“ ... Everyone exclaims happily, smiling happily. ”When people walk to encounter the river, to cross the other side of the arc, this arc was people stepped on at the foot, into a ... “ ”a bridge! “ Hear the teacher’s inspiration, we unanimously Answer. ”Although their names are called ’bridge’, but the appearance is different, please look at the world famous bridge. “ Said, zebra teacher click the mouse, the projection screen appeared in a wide range of Bridge picture, ”This was built 1400 years ago