cho tam giác ABC đều cạnh a, từ điểm O trong tam giác hạ OH, OK, OE lần lượt vuông góc với các cạnh AB, BC, CA. Khi đó OH+OK+OE= ? giúp em/tớ với mn ơi. mai em/tớ phải nộp r ;-;

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.