Hello!My name is Bob. My classroom is not big but nice. There are 21 desks and 20 chairs. 墙上有一些画和一幅地图。Mrs Brown is our English teacher. She is from a big city.She is nice. Her husband Mr Brown is a teacher too, but he isn't in our school. Tom is my good friend. We like playing football on Saturday. Where is my football? It is under my desk.     

（1）解方程：$\frac{1}{2}$x（x﹣1）﹣（x﹣1）=0．

（2）已知抛物线y=﹣2x²+8x﹣6，请用配方法把它化成y=a（x﹣h）²+k的形式，并指出此抛物线的顶点坐标和对称轴．

有关我国自然资源基本国情的叙述，正确的是（　　）