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短测试时间 (刚开井或刚关井后的一段时间) |
short test time: 23 phrases in 12 subjects |
Automobiles | 1 |
Aviation | 1 |
Chemistry | 1 |
Construction | 1 |
Electric machinery | 3 |
Electronics | 1 |
General | 1 |
Hydroelectric power stations | 5 |
Metallurgy | 1 |
Oil / petroleum | 2 |
Plastics | 3 |
Technology | 3 |