M(N):m(оксида)=63,6:100
m(N):m(O)=63,6:36,4
это по массе, а нам надо перейти к количеству n(N):n(O)=63,6/14:36,4/16
4,5:2,275=2:1
N2O
2
a) It was the second of May yesterday. Was it the second of May? It wasn't the secobd if May.
b) Mike gave her the box of sweets. Did Mike give her the box of sweets? Mike didn't give her the box of sweetsm
c) The children saw their parents. Did the children see their parents? The children didn't see their parents.
3
a) My brother is studying English here. My brother isn't studying English here. Is my brother studying English here?
b) She is listenibg to the radio now. She isn't listening to the radio now. Is she listening to the radio now?
c) The teacher is asking the students. The teacher isn't asking the students now. Is the teacher asking the students now?
4. Напишите общий вопрос и специальные вопросы (who?, What, When? Where? и т.д.) к следующим предложениям.
a) My uncle watches TV in the evening. Does my uncle watch TV in the evening? Who watches TV in the evening?
b) They are playing tennis now. Are they playing tennis now? What are they playing now?
c) Ann bought a new book yesterday. Did Ann buy a new book yesterday? When did Ann buy a new book?
Answer the questions.
1. What should vegetarians eat? Vegetarians should eat fruit and vegetables.
2. What is the famous Caucasian longevity? It is the ability to live a long life.
3. What are the advices in eating? You should eat healthy food.
4. What do the Chinese and Japanese eat? They eat a lot of fish, seafood and rice.
5. Whom would you like to be? I'd like to be a good person. I'd like to be a dietician.
Paying more attention to your health. will help you to live a happy long life
(1)
1. Brill lives in London.
2. He goes to the beach.
3. It snows in the winter.
4. Bertie does not throw snowballs.
(2)
1. Does he play chess at school?
2. Does your brother watch TV?
3. Do they play football on Sundays?
4. Does Brill go to school every day?
(3)
1. I go to school every day.
2. Tom gets up at 7 o'clock.
3. They play football on Sunday.
4. My mother cooks breakfast every morning.
5. We go to for a walk in the evening.
(4)
1. Tim's brother does not swim.
2. I do not work every day.
3. My friend does not like milk.
4. She does not visit her granny every day.
5. His dog does not eat fish.
(5)
1. Do you eat apples? Yes, I do.
2. Does your mum work every day? Yes, she does.
3. Does rabbit run very fast? Yes, it does.
(6)
1. When does he play tennis on Friday?
2. Where do they walk in the park?
3. What does my sister like this film.