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определите число нуклонов, протонов и нейтронов содержащихся в ядре атома церии 144 Се
58
Ответы 2
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144 - нуклона
58 - протонов
144-58 = 86 - нейтронов
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Автор:
bridgett - 6 лет назад
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0
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решение во вложении
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Автор:
jenniferprice - 6 лет назад
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0
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1 вариант.
Выберите правильный ответ, который предложен под буквой (А, В, С), и вставьте его в предложение, которое пронумеровано цифрой.
1. Nick ... my close friend. A) am В) is С) are
2. Brian and Victor ... partners. A) am B) is C) are
3. I ... lucky. A) am B) is C) are
4. He ... a lot about cars. A) knows B) know C) known
5. They ... computer programs. A) make B) makes C) making
6. Someone ... here yesterday. A) come B) comes C) came
7. We ... English tea. A) like B) liking C) likes
8. Louisa ... a very interesting job. A) have got B) has got C) having got
9. Jill... to work by bus. A) go B) goes C) going
10. She ... the room every day. A) clean B) cleans C) cleaning
11. What time do you ... up? A) get B) gets C) got
12. How many hours do you ... at the office? A) stay B) staying C) stays
13. Where ... you go after work yesterday? A) do B) does C) did
14. I... my friends last week. A) visited B) visits C) visit
15. Dogs ... very fast. A) run B) runs C) running
16. Summer holidays ... in June. A) staying B) stay C) stays
17. Do you have holidays ... winter? A) on B) in C) at
18. We get to the dacha ... train. A) on B) by C) in
19. I wake up early ... the morning. A) at B) to C) in
20. He ... me a difficult question. A) ask B) asks C) asking
21. We know nothing ... it. A) in B) of C) about
22. She ... see them. A) do not B) is not C) does not
23. Do they live ... Moscow? A) in B) at C) from
24. What kind ... music are you fond of? A) on B) of C) to
25. There were seven students ... the class. A) in B) with C) on
26. They ... stamps. A) collecting B) collect C) collects
27. They are coming ... us. A) with B) of C) to 28.1 get up ... six o'clock. A) in B) at C) to
29. Do you ... a lot? A) travel B) travelled C) travels
30. We ... a contract in Finland last week. A) sign B) signs C) sighed
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Предмет:
Английский язык -
Автор:
jennatava - 6 лет назад
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Ответов:
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