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| 问题系统 | |||
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problem system : 28 phrases in 13 subjects |
| Artificial intelligence | 2 |
| Aviation | 5 |
| Business | 2 |
| Computers | 1 |
| Earth sciences | 1 |
| Electronic commerce | 1 |
| Electronics | 7 |
| Information technology | 3 |
| Management | 1 |
| Oil / petroleum | 1 |
| Sociology | 1 |
| Space | 1 |
| Technology | 2 |