cho tam giác abc cân tại a. 2 đường cao bd,ce cắt nhau tại i tia ai cắt bc tại m. cmr m là trung điểm bc, tam giác med cân

Choose the sentence that has the same meaning to the original one 1. She didn't do her homework and was punished. A. If she did her homework, she wouldn't have been punished. B. If she had done her homework, she wouldn't be punished. C. Had she done her homework, she wouldn't have been punished. D. Even if she had done her homework, she would have been punished. 2.Jack didn't leave the shop before his mother bought him a toy car. A. Jack left the shop and his mother bought him a toy car. B. Not until Jack’s mother bought him a toy car did he leave the shop. C. Not until Jack’s mother bought him a toy car did he left the shop. D. Not until Jack’s mother bought him a toy car he left the shop. 3.Despite his early retirement, he found no peace in life. A. Although he retired early, but he found no peace in life. B. His early retirement has brought him peace in life. C. He found no peace in life because he retired early. D. Early as he retired, he found no peace in life. 4.The customer didn't leave the shop before the shopkeeper apologized her. A. The customer left the shop and the shopkeeper apologized to her. B. Not until the shopkeeper apologized to her did the customer leave the shop. C. Not until the shopkeeper apologized to her did the customer left the shop. D. Not until the shopkeeper apologized to her the customer left the shop. 5.It was floody , but they didn’t cancel their trip . A. Though it was floody, they didn’t cancel their trip. B. Their trip wouldn’t be cancelled until it was floody . C. In spite of floody, their trip still went ahead. D. They put off their trip until after the flood .

viết 1 đoạn văn về môn thể thao mà em yêu thích nhất? No copy

mn giúp mình với ạ lm giúp mình bài văn về ngôi trường mơ ước bằng tiếng anh nha mn^^

2,cho tam giác abc có góc c=60 độ và trung tuyến ae=bf.cmr tam giác abc đều

I/ hope/ the future/ he/ teach/ me/ how/ do/ eggshell carving. -..............................................................................................................

Hỗn hợp khí gồm CO, CO2, SO2 ( hỗn hợp A) a, Cho A đi qua dd NaOH thu được khí B1 và dd B2 b, Cho A đi qua dd H2S c, Cho A đi qua dd NaOH không dư d, Trộn A với O2 dư. Đốt nóng ----> Khí X. Hòa tan X bằng H2SO4 90% ----> Khí Y và chất lỏng Z. Viết các phương trình phản ứng

38. The United Kingdom is divided … 4 parts: England, Scotland, Wales and Northern Ireland. A. between B. among C. into D. for 39. herbivores are animals which … A. eat meat B. eat plants C. swim very fast D. live on the bottom 40. The life … of sperm whale can be up to seventy years. A. period B. length C. distance D. span 41. Wildlife all over the world is in … A. risk B. danger C. threat D. death 42. Brazil was the ………….. of the 2014 World Cup. The 20th World Cup was held there. A. trophy B. host nation C. continent D. tournament 43. …………is a chemical used for killing weeds. A. Pesticide B. Herbicide C. Fertilizer D. Antibiotic 44. These birds ………….to North Africa in winter. A. settle B. go C. relocate D. migrate 45. Water pollution is more and more serious due to the tests of nuclear weapons in the seas and oceans. A. circulation B. environment C. elimination D. contamination 46. The farmer enrich the soil with …………. . A. fertilizers B. herbicides C. insecticides D. gases 47. The cattle drank from a river polluted with toxic chemical. A. waste B. colorless C. odorless D. poisonous 48. _________ is traditional of music of a country. A. jazz B. folk music C. pop music D. classical music 49. Actors are those who appear in front of a camera and take part of characters in a film. A. persons in a film B. cinematographers C. scriptwriters D. directors 50. There’s a love story in it, and it’s very funny. I suppose you’d call it a …………… A. horror film B. detective film C. romantic comedy D. thriller

cho tứ giác ABCD( hình vẽ ) CMR: dt EFGH=1/9 dt ABCD

CMR nếu 2(x+y)=5(y+z)=3(z+x) thì $\frac{x-y}{4}$= $\frac{y-z}{5}$