| 摘要 |
The method improves the effect of education by a linguistic advice of cassette player. The method employs a liquid display unit (4) which displays a letter information signal and saving question numbers, and a result display which computes a point of problem solving, a micom (3) which inputs a control bytes from an analog/digital converter (2), a recall switch (5), a main body (6), and an answer switch (7).
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