A：
B：
C：
D：不存在
Look at the tree. It is big and strong. It has a trunk. The trunk is big and brown. It has branches. They are brown too. Its leaves are green and beautiful. We can see some little flowers on the tree. But we can’t see the roots. They are under the ground.
下列属于湖南的名胜古迹有（ ）
与圆
相切，若
同号，则
的最小值为（ ）
