| |||
| colonne d'échange; tour d'échange | |||
|
exchange column : 9 phrases in 6 subjects |
| Chemistry | 4 |
| Earth sciences | 1 |
| Electronics | 1 |
| Natural resourses and wildlife conservation | 1 |
| Natural sciences | 1 |
| Water supply | 1 |
| |||
| colonne d'échange; tour d'échange | |||
|
exchange column : 9 phrases in 6 subjects |
| Chemistry | 4 |
| Earth sciences | 1 |
| Electronics | 1 |
| Natural resourses and wildlife conservation | 1 |
| Natural sciences | 1 |
| Water supply | 1 |