| 摘要 |
A learning aid book has a plurality of pages and includes a book binder which binds the plurality of pages. Each page has a bottom portion and a top portion. The bottom portion includes an opaque foil, a rigid base and a first frame. The opaque foil is formed from a polymeric compound and has a top surface. The rigid base is detachably coupled to the book binder. The first frame mechanically couples the opaque foil to the rigid base. The top portion includes a transparent foil and a second frame. The transparent foil has a top surface and a bottom surface. The second frame tautly frames the transparent foil and is detachably coupled to the book binder. The opaque foil has a plurality of images each of which is derived from a group of figures and characters printed on its top surface. The bottom surface of the transparent foil is disposed adjacent to the top surface of the opaque foil. Each of the respective areas of the opaque and transparent foils are releasably pressure-adhered to each other. A person can trace each image by applying pressure to the top surface of the transparent foil and can release the traced image by lifting the second frame away from the first frame.
|
