Определите сказуемое
1. In the middle of the laboratory there are usually several tables.
2. With the help of chemical reagents the students perform chemical
reactions.
3. Sodium and potassium do not sink in water
4. All living things on earth are not made up only of non-metals.
5. Scientists have detected more than seventy different chemical
elements in the organism.

Krutoyabrikos    3   01.05.2020 12:49    1