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При изобарном охлаждении газа от 320л.с. до 280л.с. давление объем уменьшился до 2л. Определить начальный объем.
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Предмет:
Физика -
Автор:
baby cakesms3w - 6 лет назад
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Ответы 0
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Площадь сада 160 га. Яблони занимают 3/8 этого сада. Сколько га занимают другие плодовые культуры?
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Математика -
Автор:
simónbrady - 6 лет назад
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1. Choose the correct variant
1. Ann ... an interesting story yesterday.
a) tells b) told c) will tell
2. Betty usually ... ice-cream.
a) wants b) wanted c) will want
3. The son ... in the first-year next year.
a) is b) was c) will be
4. His daughter ... well sums last lesson.
a) does b) did c) will do
5. Children often ...the computer.
a) play b) played c) will play
6. Parents often ... their children.
a) punished b) will punish c) punish
7. In some days his niece ... a new book.
a) reads b) read c) will read
8. Pete ... home last week.
a) went b) go c) will go
9. I ... my room tomorrow.
a) clean b) will clean c) cleaned
10. Bob ... still at the restaurant.
a) am b) is c) are d) has
11. … Victor a good time?
a) am b) is c) has
12. We… interested in cooking.
a) am b) is c) are
13. I … fond of music.
a) am b) is c) are
14. They ...dinner at 3 p.m.
a) have b) is c) has
15. Victor gets ... his work ... foot.
a) to b) in c) by d) on
16. The walls ... the restaurant are green.
a) of b) to c) with d) from
17. A waiter is … in his group.
a) kinder b) the kindest c) more kind
18. The atmosphere is … .
a) the most pleasant b) more pleasant
19. This menu is … then that.
a) better b) the goodest c)the best
20. In the room ... many tables.
a) is b) there is c) there are
21. I don't want ___ to drink.
a) some b) any c) anything d) few
22. They buy … books in the shop.
a) many b) much c) a little
23. There is ... milk in the glass.
a) a few b) a little c) many
24. I want to be a good builder, so I ... study well.
a) can b) must c) may d) have to
25. You ... to take my book tomorrow
a) may b) will be allowed to c) can d) will able to
26. Parents ... bring up children.
a) must b) can c) may d) have to
27. Pete ... read well.
a) must b) can c) may
28. I bring five ....
a) knifs b) knives c/ knifes
29. There are many ... in the gym.
a) box b) boxs c) boxes
30. He has ill ... .
a) teeth b) tooth c) toothes
31. There are many ... in this city.
a) librarys b) libraries c) libraryes
32. How many ... are there in the room?
a) table b) tables c) the tables
33. ... home I met my friend.
a) go b) going c) is going
34. I see my dad. I try to call ... .
a) he b) him c) his
35. Do you read the book?
a) GQ b) SQ c) AQ d) DQ
36. Did he play or rest yesterday?
a) GQ b) SQ c) AQ d) DQ
37. What will you read ?
a) GQ b) SQ c) AQ d) DQ
38. This is ... hamster.
a) Peter b) Peters’ c) Peter’s
39. Roma ... a new car by evening tomorrow.
a/ will sell b/ will be selling c/ will have sold d/ has sold
40. We ... exams at 6 p.m. yesterday.
a/ were passing b/ passed c/ had passed d/ are passing
41. Betty already ... the room .
a/ cleaned b/ has cleaned c/ clean d/ is cleaning
42. We .... sums at this time.
a/ do b/ is doing c/ arte doing d/ have done
43. We ... for the seminar from 3 till 8 at the library tomorrow.
a/ will be preparing b/ will prepare c/ are preparing d/ will have prepared
44. Betty ... the dishes before her mom came.
a/ washes up b/ has washed up c/ had washed d/ was washing-
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Автор:
fidoqei7 - 6 лет назад
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даны векторы a=-2i+j,b (10:-15) c=3a -1/5b найдите координаты вектора С
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