长方形个数的规律公式图片简介：Immediately afterwards, I heard a clang behind me, and the attic door closed! Then the rumbling gates fell down one after another, with complicated seals engraved on the gates, and the whole attic suddenly became dark!
Immediately afterwards, I heard a clang behind me, and the attic door closed! Then the rumbling gates fell down one after another, with complicated seals engraved on the gates, and the whole attic suddenly became dark!
