| 摘要 |
If the student knows the note he/she can pass on to another, but if not he/she must revise it. The notes must not be so small that they disturb concentration and so are made larger than usual at about 3 to 12 mm. - The key and the note occupy 30 to 95 per cent of the back surface of the card. The cards are stacked letting a part overlap to left or right from 8 to 60 mm to form a musical line. The reverse of the card has the note, the range, teh ket and the name marked on it.
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