Cho tam giác ABC có AB =AC . Gọi M là trung điểm của BC . Chứng minh răng AM vuông góc với BC

7. Life in the country is different ______ life in the city. A. from B. of C. to D. with 8. “Can you help me to carry this box?” – “______”. A. No, thanks B. I think so C. Yes, I’d love to D. Sure 9. They often come to see their friends on Sunday, ______? A. do they B. are they C. don’t they D. can they 10. My mother came into my room while I ______ television. A. am watching B. was watching C. watch D. watched 11. She doesn’t know the man ______ sent her this letter. A. which B. who C. whom D. whose 12. ______ she is not happy, she always tries to smile. A. So B. However C. Although D. And 13. His business is growing so fast that he must take ______ more workers. A. up B. on C. in D. over 14. If Nam comes to England, it’ll be a good ______ for him to improve his English. A. opportunity B. possibility C. advantage D. experience 15. He taught me how ______ the new computer. A. starting B. to start C. start D. started

Cho tam giác DEF. Đường trung trực của đoạn thẳng DE cắt EF tại I. Trên tia đối của tia ID lấy điểm K sao cho IK = IF. Chứng minh DE // KF

Các bạn ơiii Có thể giúp mịn được hong ạ Xin cảm ơn rất nhìu

Exercise 1. Fill in the blanks with WHO, WHICH or THAT: 1. The men _______ lives next-door are English. 2. The dictionary _______ you gave me is very good. 3. Do you know the girls _______ are standing outside the church? 4. The police are looking for the thieve _______ got into my house last night. 5. The chocolate _______ you like comes from the United States. 6. I have lost the necklace _______ my mother gave me on my birthday. 7. A burglar is someone _______ breaks into a house and steals things. 8. Buses _______ go to the airport run every half hour. 9. I can’t find the key _______ opens this door. 10. I gave you a book _______ had many pictures. 11. I don’t like the boy _______ Sue is going out with. 12. Did you see the beautiful dress _______ she wore yesterday. 13. The man _______ she is going to marry is very rich. 14. This is the bank _______ was robbed yesterday. 15. He wore a mask _______ made him look like Mickey Mouse. Exercise 2. Fill in the blanks with WHO, WHICH or WHOSE: 1. He arrived with a friend ______ waited outside in the car. 2. The man ______ mobile was ringing did not know what to do. 3. The car ______ the robbers escaped in was a BMW. 4. The woman ______ daughter was crying tried to calm her down. 5. The postman ______ works in the village is very old. 6. The family ______ car was stolen last week is the Smiths. 7. The cowboy ______ is wearing a red shirt looks very funny. 8. A bus is a big car ______ carries lots of people. 9. The volunteers, ______ enthusiasm was obvious, finished the work quickly. 10. Children ______ like music are often good at mathematics. 11. The engineers ______ designed the building received an award. 12. The girl ______ recited the poem is my niece. 13. The townspeople, __pride in their community is well- known, raised enough money to build a new town hall. 14. The Pacific Ocean, ____ might have been crossed by raft during the Stone Age, is the world’s largest ocean. 15. The newspaper to ______ we subscribe is delivered regularly.

Xin nhờ các cao nhân chỉ giúp đề 2 ạ

Khi làm khô 27,8 gam tinh thể muối sắt (II) sunfat ngậm nước có dạng FeSO4.aH2O người ta thu được 15,5 gam FeSO4 khan. Hãy xác định giá trị a.

_+có môt số giải pháp góp phần giảm số vụ và mức độ nghiêm trọng của tai nạn giao thông như sau : -Thông qua vc nâng cấp các công trình giao thông , kiến cho ng ham gia giao thông tí tình huống khó khăn và nguy hiểm hơn - giáo dục và đào tạo ng tham gia gia thông để họ chấp hành nghiêm túc các nguy định pháp luật và có thể giải quyết tốt hơn cho các tình huống khi tham gia giao thông - cưỡng chế thực hiên các quy định của pháp luật về trận tự an toàn giao thông nhằm hạn chế các hành vi góp phần làm cho moi trường giao thongio an toàn hơn 1. Em hiểu thế nào về các giải pháp trên ? 2. liên hệ các giải pháp nêu trên đẻ góp phần giảm thiểu tai nạn giao thông ở địa phương em ?

II. chọn đáp án đúng: 1. Are you (interesting/ interested) in football? 2. The football match was quite (exciting/ excited). 1 enjoyed it. 3. It's sometimes (embarrassing/ embarrassed) when you have to ask people for money C. decided D. disappointed nonEioao a. 4. Do you usually get (embarrassing/ embarrassed)? 5. I had never expected to get the job. I was really (amazing/ amazed) when I was offer it 6. She has really very fast. She has made (astonishing/ astonished) progress 7. 1 didn't find the situation funny. I was not (amusing/ amused) 8. It was a really (terrifying/ terrified) experience. Afterwards everybody was very (shocking/ shocked) 9. Why do you always look so (boring/ bored)? Is your life really so (boring/ bored) 10.He's one of the most (boring/ bored) pcople I've ever met. He never stops talking and be never say anything (interesting/ interested). 11. At first I thought Jake was an interesting/interested guy, but tonight I felt somewhat boring/bored with his company. II. Cho dạng đúng của từ 1. The film wasn't as good as we had expected. (disappoint) a. The film was b. We were with the film. 2. Diana teaches young children. It's a very hard job but she enjoys it.(eshaust) a She enjoys her job but it is often b. At the end of a day's work, she is often 3. It's been raining all day. I hate this weather. (depress) a. this weather is________ b.this weather makes me__________ c.it's silly to get_____ because of the weather

Có 70 vây được trồng thành các hàng đều nhau nếu bớt Đi 2 hàng thì mỗi hàng còn lại phai trồng thêm 4 Cây thì mới hết sợ Cây đã có. Hỏi có bao nhiêu hàng Cây