如图图案中，可以看做是中心对称图形的有（   ）

根据短文内容，选择正确答案。

Long long ago, there was a spider. She found a beautiful farm. She liked the farm and decided to live there forever.

    One day, the spider caught a little bug. When the spider ate it, the bug said, “If you let me go, I will tell you an important thing. The thing will save your life.” The spider stopped and listened.

    The little bug said, “You'd better get out of the farm. The harvest is coming! If you stay here, you will be killed by the farmer's machine.”

    But the spider didn't listen to the bug and ate it for lunch. The next day when she was sleeping, the farmer came to have a harvest. The spider was killed by the machine.