cho ΔABC cân tại A(Góc A ∠90Độ) kẻ hai đường cao BE và CD(E ∈AC,D ∈AB) Chứng minh a, ΔBDC= ΔCEB B,AD=AE C,DE//BC D,Gọi H là giao điểm của BC và CD.Gọi M là trung điểm của BC,chứng minh ba điểm A,H,M thẳng hàng

1. There are asthma, allergies and other respiratory illness when air pollution happens. Air pollution results……………………………………………………………………………… 2. Eating too much sugar can result in health problems. Eating too much sugar can lead ………………………………………………………………………………… 3. I can’t swim, so I won’t go scuba- diving with Jerry. If …………………………………………………………………………………………………………………… 4. The boys didn’t go swimming because the weather was cold. Because of ……………………………………………………………………………………………………… 5. “I like to do physics experiment”, he said. He said that ………………………………………………………………………………. 6. The area is uninhabitable. The Chernobyl nuclear accident happened. The Chernobyl nuclear accident made. …………………………………………………. 7. The volcano erupted after most people had left. Before ……………………………………………………………………………………. 8. Volunteers have given out food to homeless people. Food ……………………………………………………………………………………… 9. I think you should grow vegetables in the garden. If I ………………………………………………………………………………………… 10. Jack: “Mary, I’m leaving Viet Nam tomorrow.” Jack told Mary that .............................................................................................................................. 11. Acid rain is dangerous. Trees' leaves are damaged. Trees' leaves are damaged because .......................................................................................................................... 12. He asked Mary: “How did you feel when you saw the alien?” He asked Mary ..................................................................................................................................... 13. We turn on the heater all the time. We have to pay three million dong for electricity a month. If we didn’t ............................................................................................................................................ 14. They are going to organise a garden party to raise money for the victims of the flood. A garden party ...................................................................................................................................... 15. “You have to sign the paper again.” She told me. She said to me …………………………………………………… 16. Mr Smith will collect the tickets. The tickets ……………………………………………………….. 17. The noise from the music club is loud, so the residents of the street cannot sleep. Because of ………………………………………………………. 18. She has a headache after work every day. She works in a noisy office. If she didn’t ………………………………………………………. 19. Peter said, “I’m living in London now.” Peter said ..................................................................................................................................................... 20. Tom was at home because his leg was broken. Because of …………………………………………… ……………………………………………………. 21. I don’t have enough time , so I can’t go on holiday this summer. If I ……………………………………………………………………………………………..................... 22. They have built two department stores recently. Two department stores..................................................................................................................................... 23. Bill bought a new computer at the supermarket yesterday. A new computer…………………….………………………………………………………………….…… 24. The polluted water leads to the death of the fish. The polluted water makes……………………………………………………………………………………………… 25. The karaoke bar makes so much noise almost every night. The residents complain to its owner. If the karaoke bar didn’t ............................................................................................................................ 26. People know him as an environmentalist. He ............................................................................................................................................................... 27. People have spoiled this area for a long time. This area ...................................................................................................................................................... 28. John told Chau: ‘ I’m leaving Viet Nam tomorrow.’ John told Chau that ..................................................................................................................................... 29. We can’t see the stars at night. There is too much light pollution. We can’t see the stars at night due .............................................................................................................................. 30. Global warming happens when there is too much carbon dioxide in the atmosphere. Too much carbon dioxide in the atmosphere causes......................................................................................................

cho tam giác abc nhọn,hai đường cao BE và CD a, chứng minh AD*AB=AE*AC b, chứng minh tam giác ADE đồng dạng tam giác ACB c,cho EB=EC ,F là trung điểm EC.Đường thẳng vuông góc với BF tại O vẽ từ E,cắt đường thẳng vuông góc với EC vẽ từ C tại K . chứng minh EF=CK

The programmes/ aim/ improve/ elephant protection and management/ reduce poaching/ the illegal ivory trade. It/ very necessary/ raise people’s awareness/ important role/ water/ their daily activities. Choose one word whose stress is placed differently from the others. important permanent convenient attractive “____” - "It was very sunny and hot. We had a bit of a heatwave. How was the wave? Did you enjoy your holiday? How was the beach? What was the weather like there? I had a ______ chat with my manager and gave him an update on the project. quick short lull brief This company can ____ for wage discrimination among workers of different genders. be suing be sued sue sued Chocolates and flowers are by far ____ presents for mothers on Mother's Day in the UK. more popular the more popular the most popular less popular This is my new tablet. It uses the latest digital technology. (Using a relative pronoun) "I'm sorry I couldn't come to your birthday party last Friday, Jane," Bod said. (Change into reported speech)

giúp mik vs mn ơi!!!!! mình cần gấp

Trong bài thơ “ Đoàn thuyền đánh cá” , hình ảnh thơ nào được lặp lại nhiều lần nhằm làm nổi bật tư tưởng của bài thơ. Việc lặp lại đó nhằm nói lên tư tưởng gì?. Bằng một đoạn văn hãy chỉ ra ý nghĩa?

Phân tích đa thức thành nhân tử x ² - 3x + 5

Mình cần 1 bạn giải cho mình bài 1 với bài 5 ạ. Mỗi bài 10 điểm, bạn nào giải đc 2 bài sẽ là 20 điểm ạ, em cảm ơn

Tại sao các nhà yêu nước Việt Nam đưa ra những đề nghị cải cách nào cuối thế kỷ XIX?Kể tên những nhà cải cách ở Việt Nam nửa cuối thế kỷ XIX?

Cho tam giác ABC. Chứng minh rằng sin2A+ sin2B bé hơn hoặc bằng 2sinC