Oxide Copper (II) oxide (CuO) tác dụng được với: * A. H2O. B. H2SO4 C. CuCl2. D. NaOH Hãy cho biết phản ứng hóa học viết không đúng * A. NaOH + HCl -> NaCl + H2O B. 2 NaOH + CuCl2 -> 2 NaCl + Cu(OH)2 C. 2 NaOH -> Na2O + H2O D. 2 NaOH + CO2 -> Na2CO3 + H2O

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I think you should buy _____  pack of mineral water instead. And you can also buy _____  snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______  cookies and soft candies.

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We should decorate our living room with _____ orange banner. We also need ________  ribbons, balloons, party hats and costume.

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I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.