viết các phương trình phản ứng xảy ra trong quá trình luyện gang : tạo chất khử CO CO khử oxit sắt từ trong quặng manhetit Fe3O4 Đá vôi bị nhiệt phân hủy thành CaO phản ứng vs SiO2 tạo xỉ

Choose the best answer.

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.

Choose the best answer.

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

Choose the best answer.

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