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| sistema fechado | |||
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sistema cerrado : 20 phrases in 9 subjects |
| Communications | 2 |
| Electronics | 3 |
| Environment | 1 |
| General | 3 |
| Information technology | 1 |
| Mechanic engineering | 7 |
| Medical | 1 |
| Natural sciences | 1 |
| Transport | 1 |
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