| 摘要 |
<p>PURPOSE:To efficiently use a collection of questions at any place by instrantaneously confirming whether one's own answer is correct or wrong at the time of study using a collection of questions. CONSTITUTION:Correct and wrong answer columns are formed to the answer column related to the questions of a collection of questions to apply a mark to said columns and, by applying the light emitting part and light detecting part of an infrared sensor to the mark of the answer column and the error part of a sentence, one's own correct or wrong answer can be individually confirmed by the sound of an earphone or headphone.</p> |
