какое значение имеют металлы в литосфере и биосфере?

какое значение имеют металлы в литосфере и биосфере?
- Предмет:
  Химия
- Автор:
  andresp83u
- 6 лет назад

Ответы 1

Металлы играют большую роль в биосфере. Кальций является основой костной ткани,железо входит в состав гемоглобина крови,а магний в состав хлорофилла зелёных растений. Без участия атомов металлов невозможны важнейшие процессы в живых организмах:перенос кислорода,фотосинтез,обменные процессы.
- Автор:
  armanigcpa
- 6 лет назад
- 0
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a was
b is being
c has being
d being

2 He announced that the Russian delegation … the session to show its protest.
a leave
b would leave
c will leave
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3 They … him when he tries to cross the border.
a will have been shooting
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4 I want this article … by 5 p.m.
a translating
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b was looking, noticed
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6 While he (water) the flowers, it (begin) to rain.
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c was watering, has begun
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7 It was early morning. The sun … just…
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b had … risen
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d have…rose

8 Look! That plane is flying towards the airport. It … .
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b will be landing
c is going to land
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9 The boy who … us this story lives in a camp.
a told
b had told
c was telling
d has told

10 Why … you … the radiator, it is cold.
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c does … feel
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11 If she … known the facts she could have told us what to do.
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c would have
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12 Unless you … stop wasting time, I’m leaving right now.
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a warned
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c would know
d will know

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какое значение имеют металлы в литосфере и биосфере?

Ответы 1

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