Finish these sentences:
1. D.Mendeleev created……….(the table of chemical elements).
2 I.Pavlov discovered …….(conditional reflexes)
3 A.Popov invented …….( the radio).
4. A.Einsttein worked on the ….(theory of relativity).
5 Marie Curie opened …..(radium).
6 J.L.Baird invented the ….(television).
7 A.Bell invented the …(telephone).
8 W.K/Roentgen opened …….(X-rays).
9 M.Faraday discovered …..(electromagnetic induction)