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(9-a)^2 дробь (3+√а)^2 81-а^2 дробь 9+а (9-а)(9+а) дробь 9+а Сокращаем 9+а Ответ 9-а
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Автор:
krause - 6 лет назад
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У собаки чёрный цвет шерсти доминирует над коричневым. От скрещивания чёрной самки с коричневым самцом получено 4 чёрных и 3 коричневых щенка. Определите генотипы родителей и потомства.
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2. Open the brackets using the verbs in the required tense and voice.
1. Last year we (visit) _______________ my cousin who (live) _______________ in Los Angeles.
2. The system (sell) _______________ to us by a computer specialist.
3. We (learn) _______________ English for 6 years. John has learnt more than 200 words this month.
4. When I came in they (sit) _______________ round the fire. Mrs. Pitt (knit) _______________, the others (read) _______________ . Mrs. (smile) _______________ at me. I (invite) _______________ to sit down.
5. Tom is coming tonight. I (be) _______________ sure that I (recognize) _______________ him.
6. They say these paintings (exhibit) _______________ till the end of the month.
7. It is a lovely day. The sun (shine) _______________ and the birds (sing) _______________.
8. Look at your shoes! They must (repair) _______________.
3. Fill in the gaps where necessary or open the brackets.
1. Why do you always let your children _______ do whatever they like?
2. There is _______ in the clothes basket.
3. (Few/A few) days ago I tried to buy _______ birthday cards for three-year-old children.
4. I understood who had taken my shoe. I can’t say he behaved (well/good).
5. What time will you arrive? I _______ know. It depends _______ the traffic.
6. Ben lives _______ a village. He usually comes to visit us _______ Sundays.
7. It’s difficult to get _______. There is a fence _______ the garden.
8. Switch it on _______ pressing this button.
9. Sam always plays a joke _______ his desk mate.
10. I’m busy at the moment. Come _______ ten minutes’ time, please.
11. We started off _______ midnight and reached _______ place of destination _______ twelve hours at noon.
12. I’ve been learning _______ I was _______ little boy.
13. Who will make _______ come on time?
14. Don’t let me _______ interrupt you. Please go _______.
15. If it (rain) _______ at the weekend, we (not able to) _______ plant the vegetables.
16. We have imported (less/fewer) videos this year than the last one.
17. _______ shop assistants are good _______ inventing excuses.
18. Please don’t give _______ the idea of joining our basketball team. You are one of (good) _______ players I’ve ever met.
19. There is _______ in the room. Turn off _______ light.
20. _______ old couldn’t help _______ young.
4. Write either the feminine or the masculine of the nouns below:
Waitress; monk; goose; lion; post woman; he-wolf; sir; niece; actor; bachelor.
6. Choose the right form of the verb:
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2. The police (know/knows) about the stolen money.
3. Fortunately news (aren’t/isn’t) as bad as we had expected.
4. Athletics (is/are) my favorite sport.
5. The government (have/has) not been appointed yet.
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