Cho tam giác ABC cân tại A, tia phân giác góc A cắt BC tại D. a. Chứng minh DB = DC. b. Kẻ DH vuông góc AB (H thuộc AB), DK vuông góc AC (K thuộc AC). Chứng minh Tam giác DHK cân. c. Chứng minh HK // BC ( nhớ vẽ hình)

Giải giúp em với ạ em tim và cho cúp ạ

II.Find the word which has a different sound in the part underlined 1. A. animation B. female C. pavement D. safety 2. A. sign B. critic C. illegal D. direct 3. A. filled B. wanted C. played D. opened 4. A. recommend B. seatbelt C. vehicle D. investigate 5. A. cooked B. talked C. booked D. naked III. Rewrite the sentences so that they have the same meaning as the original ones. 1. They didn’t often go to the cinema every Sunday last year.-->They didn’t use ......................... 2. Linda doesn’t live with her parents any more. -->Linda used .............. 3. I don’t have time to collect stamps as when I was in primary school. -->I used ......... 4. He is not a poor man any more, but he becomes a rich businessman. -->He used ............... IV.Read the passage and answer the questions. Many people still believe that natural resources will never be used up. Actually, the world’s energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnharm of the New England Institude of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the only alternative. However, many people do not approve of using nuclear power because it’s very dangerous. What would happen if there was a serious nuclear accident? Radioactivity causes cancer and may badly affect the future generations. The most effective thing is that we should use natural resources as economical as possible. 1. Are the world’s energy resources unlimited? 2. What is the most effective thing? 3.Do we know exactly how much fuel is left? 4.Why do not many people approve of using nuclear power? TEST 5 1. I was ________ to learn that the director of that gripping film has won the first prize. A. interest B. interests C. interested D. interesting 2. The film was so ________. However my father saw it from beginning to end. A. interesting B. exciting C. boring D. fascinating 3. We were ________ with the latest film of that director. A. satisfied B. satisfactory C. satisfying D. satisfy 4. We like the film very much. The ________ are unforgettable and the plot gripping. A. character B. acting C. style D. action 5. I have never felt as ________ as I did when I watched that horror film. A. terrify B. terrified C. terrifying D. terrible 6. Not many people went to see the film; ________ it received good reviews from critics. A. although B. but C. despite D. however 7. Let’s go to the Victor Cinema. I’m sure you’ll find the film ________. A. excites B. excite C. excited D. exciting 8. Last night, I didn’t go to bed early _________ being very tired. A. because of B. although C. despite of D. in spite of 9. __________ they spent a lot of money on the film, it wasn’t a big success. A. Nevertheless B. However C. When D. Although 10. Mr. Bean’s Holiday is a ___________ film – I was laughing from beginning to the end. A. moving B. scary C. violent D. hilarious 11. ________ careful preparation, we have a lot of difficulties in making a new film. A. Such B. However C. Despite D. With 12. A___________ is a film that shows real life events or stories. A. documentary B. thriller C. comedy D. action 13. I went to the cinema with my friends yesterday ________ feeling very tired. A. although B. So C. In spite of D. but 14. The end of the film was so ___________ that many people cried. A. boring B. shocking C. exciting D. moving 15. We didn’t find it funny ________ it was a comedy. A. but B. although C. despite D. in spite of 16. A _________ is a film that tries to make audiences laugh. A. sci-fi B. documentary C. comedy D. horror 17. I enjoy the film on TV yesterday evening ________ nobody in my family liked it. A. so B. yet C. although D. in spite of 18. I found the book so __________ that I couldn’t put it down. A. gripping B. shocking C. tiring D. boring 19. ________ he spent too much money on the film, it wasn’t a big success. A. But B. Even C. Despite D. although 20. We found the plot of the film__________. A. bored B. boring C. interested D. acting

Cho tam giác ABC cân tại A, tia phân giác góc A cắt BC tại D. a. Chứng minh DB = DC. b. Kẻ DH AB (H AB), DK AC (K AC). Chứng minh DHK cân. c. Chứng minh HK // BC. Giúp mik vs ạ !!

Trong 3 giờ xe máy đi được 105km. Trong 2 giờ ô tô đi được 115km . Hỏi mỗi giờ ô tô đi nhiều hơn xe máy bao nhiêu km?

Đốt cháy 3 g chất hữu cơ A, thu đc 8,8 gam CO2 và 5,4 gam H2O. Biết tỉ khối hơi của A so với khí hidro là 15. Hãy xác định công thức phân tử của A

Cho 8,4 gam một anken x phản ứng vừa đủ với dung dịch brom.thu đc 24,4g sản phẩm cộng.CTPT x là

giúp mình đi mình đang cần gấp giải chi tiết 1 chút

34. That restaurant is so dirty that no one wants to eat there. It is such................................................................................................................................ 35. Tim will be eighteen next week. It's Tim's............................................................................................................. Giúp mình với

Hãy chỉ các lỗi về liên kết nội dung trong các đoạn trích sau và nên cách sửa lỗi ấy. a)(1)Cắm bơi một mình trong đêm. (2)Đêm tối bưng không nhìn rõ mặt đường. (3)Trên con đường ấy, chiếc xe lăn bánh rất êm. (4)Khung xe phía cô gái ngồi lồng đầy bóng trăng. (5)Trăng bồng bềnh nổi lên qua dãy Pú Hồng. (6)Dãy núi này có tính chất quyết định đến gió mùa đông bắc ở nước ta. (7)Nước ta bây giờ là của ta rồi, cuộc đời đã bắt đầu hửng sáng.