Làm câu 2 và câu 3 giúp mk nhé nhanh nha

Viết số tự nhiên thỏa mãn yêu cầu sau: a)nhỏ nhất có 7 chữ số b)nhỏ nhất có 7 chữ số khác nhau và số đầu tiên là 6 c)lớn nhất có 9 chữ số d)lớn nhất có 9 chữ số khác nhau và số đầu tiên là 1 làm nhanh giùm mình nha

Nêu phương pháp thu được Ca tinh khiết từ hỗn hợp Al2O3, Fe2O3, CuO

1 cau giai nhanh giup voi vote 5 sa0

GIÚP MK BÀI 2 VS Ạ.MK HỨA SẼ VOTE 5 SAO Ạ.MK CẢM ƠN

Finish the second sentence in such a way that it means the same as the first one. 1. Their father got to London by taxi last Monday.  Their father took a .......................................................... 2. How long is your flight from Hanoi to Jakarta?  How long does ................................................................ 3. If you practice speaking English regularly, your English will be better.  The ................................................................................. 4. I had a mechanic repair my car yesterday.  I got ..................................................................................... 5. Peter didn’t do the homework and Tim didn’t either.  Neither .................................................................................

Giải phương trình sau: $\frac{1}{2x-2}$ - $\frac{2x+1}{x²+x+1}$ + $\frac{3}{2x+2}$ =0

Finish the second sentence in such a way that it means the same as the first one. 1. Listening to music at home is more interesting than going to the concert.  I prefer............................................................................... 2. We didn’t enjoy the trip because of the heavy rain.  The heavy rain prevented.................................................. 3. He is slower and more careful driver than I am.  He drives........................................................................... 4. The visitor spoke so quickly that I couldn’t understand what he said.  The visitor spoke too........................................................ 5. They haven’t changed anything in the room.  Nothing ...........................................................................

Choose the best answer A, B, C or D to fill each blank in the following passage. EASTER Easter is an important Christian festival and holiday. It is (1) _______ to celebrate the resurrection of Jesus Christ. Easter is not a fixed holiday. Its (2) _______ varies between 22nd March and 25th April. People celebrate Easter (3) _______ the world. In the UK, Easter is a public holiday. People (4) _______ Easter chocolate eggs to their friends and family. There are also egg hunts for kids. In the US, Easter is a (5) _______ holiday. People can go to church and have a family meal. They also (6) _______ egg hunts and give gifts of coloured eggs. In Russia, Easter is one of the (7) _______ important holidays. People celebrate it (8) _______ an Easter breakfast or meal. They also create very beautiful Easter eggs. 1. A. made B. held C. gave D. opened 2. A. day B. date C. event D. month 3. A. through B. in C. all D. around 4. A. eat B. have C. give D. receive 5. A. nation B. local C. native D. national 6. A. organize B. play C. do D. try 7. A. more B. best C. most D. better 8. A. with B. by C. for D. in

Read the passage and choose the best answer. LITTER ON MOUNT EVEREST Mount Everest is the highest mountain in the world. It is also the highest trash pile in the world. About 400 people try to reach the top every year. This many climbers means a lot of trash. It is very dangerous to climb Mt. Everest. The air is very thin and cold. Most people carry bottles of oxygen; they could die without it. When the oxygen bottles are empty, people throw them on the ground. When strong winds rip their tents, people leave them behind. They don’t have the energy to take the trash away. They only have enough energy to go down the mountain safely. Trash is a terrible problem. Since people first began to climb Mt. Everest, they have left 50,000 kilos of trash on the mountain. Several groups have climbed the mountain just to pick up the trash. When people plan to climb the mountain, they have to plan to take away their trash. 1. What is the main topic of the passage? A. Wind on the mountain B. A problem with trash C. A dangerous mountain D. Climbing safely 2. Where do climbers put their empty oxygen bottles? A. On the ground B. In trash cans C. On their back D. In their tents 3. Why do climbers leave their trash on the mountain? A. Special groups will pick it up. B. The wind will blow it away. C. They don’t have the energy to take it away. D. Other climbers will use it later. 4. How much trash is on the mountain? A. Four hundred kilos B. Four thousand kilos C. Five thousand kilos D. Fifty thousand kilos 5. Why do climbers on Mount Everest carry bottles of oxygen? A. The weather is cold. B. Climbing makes them tired. C. The air is very thin. D. They are thirsty. 6. In line 7, people leave them behind, what does the word them refer to? A. Tents B. Oxygen bottles C. Strong winds D. Other climbers