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Концетрации хлорной извести и хлорамина Б.И в чем их отличие друг от друга?
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Предмет:
Другие предметы -
Автор:
lili18 - 6 лет назад
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Ответы 1
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Оба дез. средства.Хлорамин более устойчив к факторам внешней среды.Хлорамин в отличии от хлорки не действует разрушительно на ткани и не отбеливает их(ткани).Оба раньше применяется в медицине.Но теперь увы......давно ушли в прошлое!
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Автор:
finnegan5mqv - 6 лет назад
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Выберите лучший вариант употребления страдательного залога:
1. The day before yesterday we _____________to the restaurant.
A) are invited; B) were invited; C) invite.
2. Look! The bridge _____________.
A) is being repaired; B) is been repaired; C) has being repaired.
3. The letter and the parcel _____________tomorrow.
A) will be post; B) will have been posted; C) will be posted.
4. Margaret _____________to be a very industrious person.
A) has been known; B) is known; C) is been known.
5. In Greece the Olympic Games _____________once in four years.
A) were held; B) are being held; C) are held.
6. The problem _________for three years, but they haven’t got any results.
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A) has been studied; B) has being studied; C) was studied.
7. This book _____________by the end of September.
A) would been published; B) will have been published;C) will been published.
8. The doctor said that Tommy’s leg _____________the following day.
A) will be X-rayed; B) would be X-rayed; C) will have been X-rayed.
9. A police car came when the injured man _____________the road.
A) was being carried off; B) was been carrying off;C) has been carried off.
10. I _____________in a small Russian town not far from Samara.
A) was borne; B) am born; C) was born.
11. Dad phoned us and asked if our luggage _____________.
A) was already being packed; B) had already been packed; C) was packed.
12. The bridge _____________ by tomorrow morning.
A) will have been constructed; B) is being constructed; C) will be constructed.
13. America’s first college, Harvard, _____________ in Massachusetts in 1636.
A) is being founded; B) had been founded; C) was founded.
14. The story of the first Thanksgiving feast _____________ among the Americans.
A) is well-known;B) have been well-known;C) would have been well-known.
15. The students _____________ on the Industrial Revolution at the end of the term.
A) will be tested; B) are being tested; C) will have been tested.-
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