Cho hai điện trở R1 =20 Ω, R2 =30 Ω được mắc song song với nhau. Điện trở tương đương của đoạn mạch là: A. 50 Ω B. 60 Ω C. 10 Ω D. 12 Ω

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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.

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.