Một vật AB có độ cao h = 4cm đặt vuông góc với trục chính của một thấu kính hội tụ tiêu cự f = 20cm và cách thấu kính một khoảng d = 2f. ( xét 2 trường hợp : Điểm A thuộc và ko thuộc trục chính của thấu kính ) Dựng ảnh A’B’ của AB tạo bởi thấu kính đã cho ? Vận dụng kiến thức hình học, tính chiều cao h’ của ảnh và khoảng cách d’ từ ảnh đến kính

trong bản tin dự báo thời tiết của nước mỹ đã dành ngày mai nhiệt độ của nước này là 38 độ. vậy nhiệt độ này nóng hay lạnh. vì sao?

Choose the best options to complete the following sentences. 1. He started his ________ when he was 20 years old. A. congratulation B. athlete C. career D. achievement 2. Tiger Woods is ________ as one of the most famous golf players. A. regarded B. looked C. become D. thought 3. ________! You’ve passed the exam. A. Thank you B. Never mind C. Congratulations D. You’re welcome 4. She was totally ________ after finishing her performance. A. exhausted B. fantastic C. exciting D. stressful 5. Doing morning exercise keeps us ________ every day. A. tired B. fat C. fit D. bored 6. They have joined many activities like sailing, cycling, fishing and football. They are very ________. A. sporty B. strange C. crazy D. helpless 7. Many football competitions are held at My Dinh ________. A. Square B. House C. Building D. Stadium 8. Don’t forget to bring your ________ to climb a mountain. A. bat B. sport shoes C. sandals D. goggles 9. The children are playing blind man’s bluff in the ________. A. court B. pool C. playground D. roof 10. France was ________ to hold the UEFA Euro 2016. A. elected B. spent C. brought D. thought

Làm 1 trong 2 câu cũng được ạ, phần hình em tự vẽ cũng được

Giúp em bài này vs ạ em cảm ơn nhiều(1-13)

Cho em hỏi mà violympic hiện tạo chưa mở vòng 8 mà đã mở vòng 9 . Chỉ em cách khắc phục và thi tiếp.đừng sam giúp mình với

22,5÷15 bằng bao nhiêu giải thích cụ thể ra ạ

Vẽ bản đồ tư duy “Đồ dùng điện nhiệt”

TIẾNG ANH 6 I. Choose the best option to complete the following sentences: 1. Is there a theatre ..... your neighbourhood ? A. in B. on C. at D. with 2. ..... the second turning ..... the right . A. Take – in B. Take – on C. Get - in D. Get - on 3. Can you ..... us the ..... to the post office ? A. show - road B. show - street C. tell - road D. tell - way 4. The map ... that the art gallery is nearer than the cathedral. Shall we go there first ? A. speaks B. asks C. says D. talks 5. A ..... is a place where we go to buy stamps or send letters . A. library B. post office C. cinema D. school 6. The air in this area is ..... with smoke from factories . A. polluted B. fresh C. noisy D. clean 7. There are many shops near here , so the streets are very busy and ..... during the day . A. noise B. narrow C. quiet D. noisy 8. It is ..... to live far from the market and the supermarket . A. easy B. inconvenient C. convenient D. comfortable 9. The people in Hoi An are incredibly ..... and ..... . A. friendly - help B. friendly – helpful C. friendship - helpess D. friend - helpfully 10. The weather is nice , so I enjoy doing ..... activities . A. outdoor B. inside C. outdoors D. boring 11. The cinema is …………… the corner of the street. A.on B.in C.at D.into 12. Going by taxi is more ………….. than going by bus. A.cheaper B.faster C.easier D.expensive 13. The streets in the Old Quarter in Ha Noi are not wide. They are …………….. A.exciting B.noisy C.narrow D.quiet 14. A …………… is a place where we can buy medicines, soap, and make-up. A.chemist’s B.grocer’s C.square D.temple 15. David’s exam results are ……………. than Nick’s. A.good B.well C.better D.important 16. Janet is not happy because her results in the competition are ……….. than her sister’s. A.bad B.good C.better D.worse 17. ………………. people own motorbikes now than ten years ago. A.Many B.Much C.More D.Some 18. This type of car is ……………… economical than that type. A.more B.much C.many D.as 19. ……………. go past the traffic lights, and turn left. A. First – than B. First – then C. Then – first D. Finally – then 20. London, the capital city of England, is a ………….. city with many old buildings, and beautiful parks. A.history B.historic C.largest D.larger II. Reading: Read the passage carefully, then answer the questions below Hoi An is great! My neighbourhood's very different. It's in the suburbs of Da Nang City. There are many things I like about it. It's great for outdoor activities because it has beautiful parks, sandy beaches, and fine weather. There's almost everything I need here: shops, restaurants, and markets. Every house has a backyard and a frontyard. The people here are incredibly friendly. They're friendlier than those in many other places! And the food's very good. However, there is one thing I dislike about it. Now, there are many modern buildings and offices so the streets are busy and crowded during the day. Questions: 1. Where’s Hoi An? ………………………………………………………………………… 2. How is the weather in Hoi An? ………………………………………………………………………… 3. What does each houses have? ………………………………………………………………………… 4. Are the people friendly? ………………………………………………………………………… 5. How is the food? .……………………………………………………………………… 6. Do you think it’s a developed area? ………………………………………………………………………… III. Writing: Reorder the words to make meaningful sentences 1. famous / Hoi An / what’s / for / ? ………………………………………………………………………… 2. for / houses / shops / pagoda / it’s / famous / and / traditional / . ………………………………………………………………………… 3. at / is / good / there / there / also / food / a / lot / . ………………………………………………………………………… 4. there / is / like / weather / what / the / ? …………………………………………………………………………

mn giúp em 5* và 1 vote câu trả lời hay cho người nhanh nhất giúp em vs em dg lm đề kt 15' nhaaaa mấy chế