木质书架提示测试

[中文]
一个木制书架，由三层搁板组成：最上层应有一本书，第二层应有三本书，底层应有七本书。

[原文]
A wooden bookshelf consisting of three shelves: On the top shelf, there should be one book, on the second shelf, there should be three books, and on the bottom shelf, there should be seven books.