Trong mặt phẳng Oxy , cho đường tròn (C) :(x-1)^2 +(y-3)^2=4 và đường thẳng d:4x+3y+5=0 .Đường thẳng d' vuông góc với đường thẳng d và cắt đường tròn (C) tại 2 điểm A,B sao cho đoạn thẳng AB có độ dài lớn nhất có phương trình là

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Bài 9:Viết lại các câu dưới đây với “since” hoặc “for”,sử dụng thì hiện taj hoàn thành. 1. I/have/this computer/three years. . 2. They/live/Da Lat/last year. . 3. She/be/happy/she had the mobile phone. . 4. We/learn/French/a month. . 5. She/work/in this school/2012. . 6. I/use/computers/5 years. . 7. The washing machine/stop working/this morning. . 8. They/know/her a long time. . 9. He/read/this/novel/9 o’clock. . Bài 11:Hoàn thành các câu sau,sử dụng dạng so sánh nhất của tính từ trong ngoặc. 1. My dad ......is dad in the world.(funny) 2. whales are....... animals in the world.(heavy) 3. mice are........ animal in the world.(cute) 4. My bedroom is........ room in my house.(comfortable) 5. I am....... cook in the world.(bad) 6. For English people,Japanese is....... language to learn.(difficult) 7. That was......... film I’ve seen.(sad) 8. My sister is...... person I know.(tidy) 9. My grandmother is........ person in my family.(old) 10. That was......... book I’ve ever read.(strange) 11.................. I’ve ever travelled is fromm London to San Francisco.(far) 12. What’s........ animal in your country?(dangerous) 13. Spain ............is country in Europe.(sunny) 14. What’s................. place you’ve ever visited.(hot) 15. What’s............ you’ve ever stayed up at night?(late) 16. It’s a very nice house.It’s house....... in the street.(nice) 17. This is a cheap restaurant.It’s I’ve........ ever been.(cheap) 18. She is a very good tennis player.Her trainer says she is .(good) 19. He’s a very dangerous criminal.The police say he is....... in the country.(dangerous) 20. We should buy him a beautiful present.Last year we give him........... gift of all in his birthday.(beautiful)