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sous-niveaux : 17 phrases in 12 subjects |
| Analytical chemistry | 1 |
| Coal | 3 |
| Communications | 1 |
| Computers | 1 |
| Construction | 2 |
| Economy | 1 |
| Environment | 1 |
| Finances | 1 |
| General | 1 |
| Information technology | 3 |
| Politics | 1 |
| Transport | 1 |
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