ответьте на вопросы
1. what is the laser?
2. what is the function of the laser?
3. what beam of plight does the laser produce?
4. when was the first laser built?
5. what types of quantum generators did scientists develop after 1960?
6. what type of the laser is the most common one at present?
7. where will the laser find the most extensive applications in future

Maruua1    1   30.10.2019 22:31    31