Example sentences of "[been] used [conj] [adj] " in BNC.
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1 | Commercially available expert system shells have been used since most of the expert systems have been developed by engineering tradesmen , few of whom had a strong computing background . |
2 | Antidiarrhoeal agents , broad spectrum antibiotics , cholestyramine , sulphasalazine , and oral corticosteroids have all been used but anecdotal experience suggests that satisfactory control of diarrhoea is rarely achieved . |
3 | A variety of media and substrata have been used but these will not be reviewed here because most experiments involve straightforward tissue or organ culture techniques which are well described elsewhere ( e.g. ref. 11 ) . |
4 | Before it was over , knuckle-dusters had been used and two of the combatants were taken to hospital . |
5 | ISI and ELI have been used as complementary and contradictory developmental strategies . |