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random sampling | |||
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optional sampling | |||
optional selection; random sampling | |||
arbitrary choice |
произвольная выбор: 30 phrases in 14 subjects |
Accounting | 1 |
Automated equipment | 3 |
Aviation | 2 |
Clinical trial | 1 |
Computer networks | 1 |
Computers | 1 |
General | 4 |
Makarov | 4 |
Mechanics | 2 |
Military | 4 |
Scientific | 1 |
Software | 1 |
Technology | 3 |
Telecommunications | 2 |