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| пропущенное слово; пропущенная буква; пропуск; пробел | |||
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欠 : 39 phrases in 7 subjects |
| Mathematics | 3 |
| Metallurgy | 1 |
| Mining | 1 |
| Nautical | 1 |
| Nuclear physics | 1 |
| Optics branch of physics | 2 |
| Technology | 30 |
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