ответ:
1 the scientists have presented a detailed analysis of the results.
2 they have brought in a food analyst to help in the research.
3 all process materials are tested using highly developed analytical techniques.
4 the researchers have corne up with an innovative idea for the use of recycled plastics.
5 charles dyson is the inventor of a vacuum cleaner which works on a new principle
6 the advent of the ballpoint pen was a wonderful invention .
7 they employ a large tearn of software developers .
объяснение:
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