Cho đường tròn (O) đường kính bằng 8cm và điểm A sao cho OA = 8cm. Vẽ tiếp tuyến AB với đường tròn (O) (B là tiếp điểm). Vẽ dây BC vuônng góc với OA tại I. a) Tính độ dài AB, BI. b) Chứng minh rằng: AC là tiếp tuyến của đường tròn (O). c) Đoạn OA cắt đường tròn (O) tại M. Qua M vẽ tiếp tuyến với đường tròn (O), tiếp tuyến này cắt AB và AC lần lượt tại D và E. Tính số đo DOE

17. You_______ walk on the ice. A. mustn't B. needn't C. mightn't D. shouldn't 18. At one time the entire world_______ by dinosaur. A. was ruled B. were ruling C. has ruled D. will be ruled 19.He warned me_______ late-night horror film. A. not watch B. against watching C. not watching D. about to watch 20.It's a about time we_______ rid of this old car. A. get B. will get C. has got D. got 21. My family_______ go to Samson beach in summer when we lived in Thanh Hoa. A. use B. used C. used to D. are used to 22.Our home needs_______. A. Painting B.to paint C. be painted D. paint 23.He often goes to the_______ to pray because his religion is Islam. A. temple B. mosque C.church D. pagoda 24.If we_______ wasting our natural resources, they will be used up in a few decade. A. turn on B. go on C. go off D. turn off 25. _______ there have been many changes in our country, it still remains a developing one. A. however B. despite C. because D. although B. Write the correct form of the word in the blank. (1.5 points) 1.News on TV is very ...................... (Inform) 2.He gets bad grades because of his................... (Lazily) 3.What is his ............................? (Nation) 4.Every man loves ................................ beauty. (Nature) 5.She had a lot of ............................ for Tet. (Prepare) 6.He run very..............……….……… (Quick) 7.It is cloudy and .......................... toay. (Rain) 8.We are interested in .......................... books. (Read) 9.Ha Long Bay is one of the ........................... of the world. (Wonderfully) 10.This…………has written many stories for children. (Write) c. Find the word(s) marked A, B, C or D that is incorrect in each of the following sentences then correct it.(1 point) 1.He should ever call again, please tell him that I am not at home. A B C D 2.She did not know where most of the people in the room was from. A B C D 3.It is impossible to believe that somebody actually admire that man. A B C D 4.According to the syllabus, you can either write a paper or you can take an exam. A B C D 5.Florida has become the twenty-seventh state in the United States on March 3, 1845. A B C D III. Reading comprehension(2 points) A. Read the passage then choose one suitable answer from the four options to fill each blank. No matter where you(1)______ in the world, there is one language that everyone understand: laughter. Scientists (2)______ us that laughter is good for us. They (3)______ that laughter can actually help us to (4)______ rid of pain and make us (5)______ good. Some scientists also say that laughter can (6)______ kill viruses and even help the (7)______ against cancer. You may have heard (8) the author who says he fought and (9)______ a battle with cancer by (10)______ himself in a room for hours to watch funny videos.

một xe đạp khởi hành từ điểm A với vận tốc 35km/h. sau 6 giờ một xe hơi đuổi theo với vận tốc 60km/ h. Hỏi xe hơi chạy trong bao lâu thì đuổi kịp xe đạp? Giúp mình với Giải bài toán bằng cách lập phương trình nha

Thực hiện phép tính (-5)^2.(-3)^2.2^3

a,|x-3|-16=-4. b,26-|x+9|=-13

Hãy nêu biểu hiện của sự tôn sư trọng đạo

Giải giúp mình với mình sẽ đánh giá các bạn 5 sao

Xếp các số thập phân 5,7 ; 5,74 ; 5,47 ; 5; 6,7 ; 5,8 theo thứ tự từ bé đến lớn

Một ô tô đi 100km thì tiêu thụ 35l xăng .Nếu ô tô đi 300km thì tiêu thụ bao nhiêu lít

A.Choose the word whose underlined part is pronounced differently from that of the others. 1.A. sure B. subject C. separate D. simple 2.A. invited B. booked C. attended D. beloved 3.A.bush B.push C. pull D. lunar B. Choose the word whose main stress pattern is different from the others. 4. violent B. website C. wonderful D. edition 5. A. advance B.happen C. perform D. compare II. Vocabularies and Grammar.(5 points) A. Complete each of the following sentences by choosing the best option among A, B, C or D. 1. “Where are Kent and Margret?” “They were hungry, so they_______ to the grocery store.” A. go B. had gone C. went D. were gone 2. I’m supposed to be here_______? A. am I B. am not I C. are I D. aren’t I 3. Every year I love helping my dad put_______ the decorations around the house. A. on B. up C. in D. off 4. People_______ outlook on life is optimistic are usually happy ones. A. whose B. whom C. that D. which 5. Dr. Sales is a person_______. A. In whom I don’t have much confidence B. Whom I don’t have much confidence in him C. In that I don’t have much confidence D. I don’t have much confidence. 6. Just a moment. Let me look at my_______. A. plan B. class C. syllable D. schedule. 7. Mexico_______ of 31 states and a federal district. A. made up B. is made up C. make up D. was making up 8.Florida_______ Georgia to the North. A. is bordered B. borders C. frontiers D. boundaries 9.The roof collapsed_______ the weight of snow. A. by B. to C. with D. under. 10. The doctor_______ him to smoke a few cigarettes each day. A. let B. make C. stopped D. allowed 11.Which would you_______ have , the red or the blue one? A. better B. prefer C. rather D. choose 12.I wish my brother _______ harder for his last exam. A. works B. worked C. had worked D. would work. 13.What were you doing when the police_______. A. came B. comes C. coming D. come. 14.If I _______ you, I_______ his advice. A. am-will not take B. will be-do not take C. would be- do not take D. were- would not take 15.What is your impression_______ the new teacher? A. to B. by C. of D. with 16. Please move in_______ more people can get on the bus. A. or else B.so that C. even though D. when. Còn nữa ha giúp em , em vote cho