Cho lượng dư bột kim loại Fe vào 200ml dung dịch HCL 1M, khi thoát ra dc dẫn qua ống đựng CuO dư nung nóng thì thu được 5,6g Cu. Tính hiệu suất của phản ứng

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.