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H2o p2o5 hpo3. Схема реакции 2h2 + o2. P2o5+h2o уравнение реакции. Fe2o3+h2.
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Коэффициенты al s al2s3
Have или has правило
Has got или have got правило
Should must have to разница
Have to should разница
Reading bill
Глагол read в present continuous
Love reading books
Now read and answer
Love read book
H2o p2o5 hpo3. Схема реакции 2h2 + o2. P2o5+h2o уравнение реакции. Fe2o3+h2. 