user-avatar
Vanho1506
2 năm trước
Đường tròn (C): x^2+y^2+4x-6y-12=0.viết phương trình đường tròn (C’) là ảnh của (C) qua phép tịnh tiến theo vectơ u (2;-3)
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. Ha Long Bay is a UNESCO world Heritage site in Quang Ninh province, in the northeast of Viet Nam. It has got over 1,600 islands and islets. Among the many ancient fishing villages in ha Long, only Cua Van floating village remains. All the houses and the buildings in the village float on huge wooden rafts. The villagers spend their days fishing and looking after the sea life. Then they sail to the mainland to trade their fish to things like food, drinking water and clothes. Most children go to floating schools and then spend the rest of their time learning important skills like swimming and fishing. They also help out their parents as much as they can. Their lifestyles may seem strange to many people, but it’s wonderful to live among such natural beauty and know you are protecting it. The villagers are able to help preserve their beautiful bay because they live directly on the water. Question 21: The word “they” in paragraph 2 is closest in meaning to _________. A. the builders B. the schools C. the villagers D. the houses Question 22: According to the passage, the villagers’ lifestyles may seem ________to many people. A. tiring B. strange C. dangerous D. boring Question 23: The villagers not only fish but also _________ the sea life. A. pollute B. damage C. look at D. look after Question 24: The villagers are able to help preserve their beauty bay because _______. A. they live on the land B. they live far from the sea C. they don’t live directly on the water D. they live directly on the water

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team