内能转化为机械能的是（ ）
A：人造卫星的运载火箭点火发射，火箭升空
B：水从高处冲下，带动水轮机转动
C：用酒精灯对铜棒加热
D：流星在地球大气层中焚烧
This is a photo of my family . I'm John . I'm ten . My sister is seven . We are in the same school .My grandparents are Americans . My father is 42 .He is a driver . My mother is 40 . She is a teacher . We are very happy .
（ ）
关于祖国宝岛台湾和雪域高原青藏地区的叙述错误的一项是（ ）
