Bài 3: Cho hình bình hành ABCD có AB = 6cm, BC = 5cm. Lấy F trên cạnh AD sao cho DF = 3cm. Tia CF cắt tai AB tại G a) Chứng minh tam giác GAF đồng dạng tam giác CDF và tam giác GBC đồng dạng tam giác CDF b) Tính độ dài đoạn thẳng BG. c) Chứng minh AD.FC = GC.FD d) GB.DF = BC. AB Giúp mik vs mấy bn ơi
Cho các chất sau: H2O, HCl, Cl2, O2, CO2. Khí metan phản ứng được với
Sông Hoàng Hà khác với sông Trường Giang ở đặc điểm nào sau đây? A: Bắt nguồn từ sơn nguyên Tây Tạng, chảy về phía đông. B: Bồi đắp nên các đồng bằng rộng, màu mỡ ở hạ lưu. C: Có chế độ nước sông thất thường, hay có lụt lớn. D: Có lũ lớn vào cuối hạ, đầu thu và cạn vào đông xuân.
1 vật được thả rơi từ độ cao 100m xuống mặt đất. Bỏ qua sức cản của ko khí , lấy gia tốc rơi tự do g= 10m/s bình. Thời gian từ lúc bắt đầu rơi cho đến khi vật chạm đất là A t=2√5 s B t=5√2s C t= 4√5s D t = 5√4s
IV. Choose the best sentence that can be made from the cues given. 21. He/ate/chocolate cake/he/diet. A. He ate the chocolate cake although he was on diet. B. He ate the chocolate cake despite he was on diet. C. He ate the chocolate cake in spite of he was diet. D. He ate the chocolate cake although he was diet. 22. Despite/heavy/rain, I/went/ school/on time. A. Despite of the heavy rain, I went to school on time. B. Despite the heavy rain, I went to school on time. C. Despite to the heavy rain, I went to school on time. D. Despite heavy rain, I went school on time. 23. Although/she/intelligent,/she/answer/question. A. Although she is very intelligent, she can’t answer my question. B. Although she was very intelligent, she can answer my question. C. Although she was very intelligent, she can’t answer my question. D. Although she is very intelligent, she can answer my question. 24. He/stop/car/although/lights/turned red. A. He stopped his car although the lights turned red. B. He didn’t stop his car although the lights turned red. C. He stops his car although the lights turned red. D. He doesn’t stop his car although the lights turned red. 25. In spite / narrow streets/, many people drive cars/this town. A. In spite of the narrow streets, many people drive cars on this town. B. In spite the narrow streets, many people drive cars in this town. C. In spite the narrow streets, many people drive cars on this town. D. In spite of the narrow streets, many people drive cars in this town
Để một thanh sắt trong không khí một thời gian thì thấy khối lượng thanh sắt tăng thêm 1,6 gam. Giả sử khi để trong không khí, sắt chỉ tác dụng với oxi. Thể tích khí oxi (đktc) đã tham gia phản ứng với sắt là A: 4,48 lít. B: 2,24 lít. C: 3,36 lít. D: 1,12 lít.
Từ văn bản Buổi học cuối cùng (An-phông-xơ Đô-đê), hãy lí giải vì sao thầy Ha- men lại nói với “chúng tôi”, những học trò của mình rằng: “… khi một dân tộc rơi vào vòng nô lệ, chừng nào họ vẫn giữ vững tiếng nói của dân tộc mình thì chẳng khác gì nắm được chìa khóa chốn lao tù…” ? Từ đó em có suy nghĩ gì về tình cảm, trách nhiệm của bản thân đối với ngôn ngữ của dân tộc mình?
Công nghiệp dệt, may thuộc nhóm ngành A. Công nghiệp nhẹ. B. Công nghiệp nặng. C. Công nghiệp vật liệu. D. Công nghiệp chế biến.
1. Mary tried to keep calm although she was very disappointed. Despite ________________________________________ 2. Even though it was raining heavily, the explorers decided to continue their journey. In spite of ________________________________________ 3. Despite his ability to do the job, he was not offered the position. Although ________________________________________ 4. He had worked very hard but he failed. Even though ________________________________________ 5. Although Tom was a poor student, he studied very well. In spite of ________________________________________ 6. Although he often tells lies, the headmaster believes him. In spite of ________________________________________ 7. Although the weather was bad, she went to school on time. Despite ________________________________________ 8. My mother told me to go to school although I was sick. In spite of ________________________________________ 9. Although there was a big storm, they decided to leave home. In spite of ________________________________________ 10. Tom was admitted to the university although his grades were bad. Despite ________________________________________ 11. Although she has a physical handicap, she has become a successful woman. Despite ________________________________________ 12. In spite of his good salary, Tom gave up his job. Although ________________________________________ 13. Though he had not finished the paper, he went to sleep. In spite of ________________________________________ 14. In spite of the high prices, my daughter insists on going to the movies. Even though ________________________________________ 15. In spite of her dislike for coffee, she drank it to keep herself warm. Although ________________________________________ 16. He couldn’t earn enough money for living although he worked hard. Despite ________________________________________ 17. Although Jane wrote for the tickets, she still had to stand in line. In spite of ________________________________________ 18. We get a good room though we didn’t phone the hotel. Despite ________________________________________ 19. She was admitted to the university in spite of her low grades. Although ________________________________________ 20. Despite the terrible food, he still eats in that restaurant. Although ________________________________________ 21. We did the test well though it was difficult. In spite of ________________________________________ 22. The flight was not delayed though it was foggy. Despite ________________________________________ 23. He ate all the fruits though they were green. Whatever ________________________________________ 24. Although he is talented, no one likes him. In spite of ________________________________________ 25. He studied very well though his life was hard at that time. In spite of ________________________________________ 26. He ate the chocolate cake even though he was on diet. Despite ________________________________________ 27. Mr. Pike doesn’t wear glasses though he is over sixty. In spite of ________________________________________ 28. Although it rain heavily, I went to school on time. Despite ________________________________________ 29. Although it was noisy, I kept on studying. No matter how ________________________________________ 30. He lived anywhere. He always thought of his homeland. No matter ________________________________________
tìm x thuộc z 1 xy-3x=-19 2 3x +4y-xy=16
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