| 摘要 |
A self-teaching book for children having a number of questions and a plurality of electronic teaching units on which a plurality of answers corresponding to each question are carried for the user to choose from. Each electronic teaching unit has seven supperimposed layers, the arrangement of which is an answer sheet, an upper conducting layer, an upper insulating layer, a source layer, a lower insulating layer, a lower conducting layer and a protective covering. A plurality of slots are respectively arranged within the upper and lower insulating layers to permit the contact between the source layer and one of the upper and lower conducting layers to activate an electronic device.
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