大尾巴:外婆住在一座大山里,每年放暑假后我就去外婆家,山里面有很多大树,我可以和小伙伴们一起爬树,还可以在树上荡秋千,在树林里捉迷藏。虽然是夏天也不会很热。可是为什么地球上会有山呢?李静李静小朋友:在地球上,陆地面积只有地球表面面积的三分之一左右,山地面积又占陆地 Big tail: grandmother live in a mountain, every year after the summer vacation I went to my grandmother, the mountain there are many trees, I can climb the tree with my friends, you can swing in the trees, hide and seek in the woods. Although it is summer it will not be very hot. But why there is a mountain on the earth? Li Jing Li Jing Kid: On Earth, the land area is only about one third of the Earth's surface area, mountainous area and land