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| bidireccional; nos dois sentidos | |||
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a due vie : 20 phrases in 11 subjects |
| Agriculture | 1 |
| Chemistry | 3 |
| Communications | 2 |
| Earth sciences | 1 |
| Information technology | 3 |
| Materials science | 1 |
| Mechanic engineering | 1 |
| Medical | 1 |
| Natural sciences | 1 |
| Statistics | 3 |
| Transport | 3 |