5. задайте вопросы к словам в скобках:
1. the glassware includes graduated (cylinders, graduated flasks, burettes, etc).
2. the glassware includes (test-tubes, funnels, glasses, flasks, retorts).
3. chemists work with (substances).
4. (the room) is well ventilated.
5. the students have( practical classes in chemistry).
6. the work requires( cleanliness).
7. flasks are used( to measure volumes).