May 2023 1 14 Report
Выберите ряд высших оксидов, в котором последовательно ослабевают их основные свойства:
1. B2O3, CO2, BeO
2. BeO, CaO, MgO
3. B2O3, Al2O3, Ga2O3
4. Rb2O, Cs2O, Na2O​
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