| 摘要 |
PROBLEM TO BE SOLVED: To provide a flash card presenting the effect of memory enhancement similarly to the case of being flashed by others even when a flash card utilizer himself/herself looks at the flash card flashed by himself/herself. SOLUTION: A set of the flash cards composed of a plurality of the flash cards on the surface of which characters or graphics are written, is characterized in that the characters or the graphics are written while their left and right sides are inverted. COPYRIGHT: (C)2004,JPO
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