1. Материя постоянно претерпевает изменения.
2. формы материи могут изменяться, но сама материя не разрушается и не создается.
3. Закон всемирного тяготения Ньютона применим к материи вообще.
4. На самом деле Роберт Браун наблюдал движение мелких твердых частиц в жидкости совершенно неожиданно.
5. Решение этой проблемы-вопрос времени.
6. многочисленные эксперименты показали, что состав каждого химического соединения постоянен независимо от того, как, где и из чего оно было приготовлено.
7. результаты их экспериментов были упомянуты на конференции.
8. материя занимает пространство и обладает массой.
My friend’s family.
My friend's name is Lavrov. He lives in Moscow. His family is not very large. He has got a wife and two children. His wife's name is Mary and his children's name are Ann and Nick.
Lavrov's wife is a young woman. She is twenty nine years old. She's a lecturer. She teaches English at the University of Foreign Languages. She has got very many students. She has not got bad students. Her students do well as a rule. My friend's daughter is a girl of ten. She goes to school. She has got a lot of subjects at school. She also learns English. She works hard and knows language well. She doesn't make many mistakes in English. She likes reading. She also helps her mother at home.
Lavrov's son is a little boy. I think he was born five or six years ago. His father takes him to a nursery school every morning.
My friend has got a sister. She is going to be a doctor. She is married. Her husband is a doctor too.
My friend has not got any brothers.
My friend's wife usually takes the children to the country in summer to stay with their grandfather and grandmother. They love their grandchildren very much. She is going to take them to the country again this summer.
