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التدرج : 20 phrases in 9 subjects |
| Acridology | 2 |
| Climatology | 1 |
| Economy | 4 |
| International Monetary Fund | 1 |
| Lighting other than cinema | 4 |
| Microsoft | 3 |
| Radio | 1 |
| Remote sensing | 1 |
| United Nations | 3 |
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