4 học sinh chọn 1 đáp án trắc nghiệm( A,B,C,D chỉ có 1 đáp án đúng). Biết khả năng chọn đáp án đúng của học sinh 1 là 90%, hs 2 60%, hs 3 70%, hs4 80%. Hs 1 chọn đáp án A, hs 2 và 3 chọn đáp án B, hs 4 chọn đáp án D. Tính xác suất để a) đáp án A đúng b) đáp án B đúng c) đáp án C đúng Mong mọi người giúp đỡ và xin cám ơn

cho tam giác ABC VUÔNG tại A , đường tròn tâm O đi B và C ,cắt AB , AC tại D và E ( BC không phải là đường kính) , đường cao AH cắt DE tại K .1)CMR góc ADE =góc ACB 2) Cmr K là trung điểm của DE 3) Nếu K là trung điểm của HA . Cmr DE là tiếp tuyến chung ngoài đg tròn đường kính BH và CH

Câu 5:Cho∆ ABC cân tại A. Trên cạnh BC lấy hai điểm D và E sao cho BD = CE và BD < .1/2 BC a.Chứng minh ∆ ADE cân b. Kẻ BM AE, CN AD( M ∈ AE, N∈ AD). Chứng minh rằng BM = CN. c.Chứng minh: AM = AN d. Gọi O là giao điểm của BM và CN, biết OM = 1cm, OA = 3cm. Tính AN them hinh nhanh nhe

III. Supply the correct form of the verbs / the adjective in the blanlet. 1. I (buy) ……………………. a ticket for the football match yesterday. 2. Trung usually (go) ……………….. to school on foot. 3. ( you / ever sing ) ……………………….. karaoke? 4. Ms Dung (not take) ……………………. the bus to work last Tuesday. C. READING (2ms) I. Read the following passage then answer the questions. ​Tokyo, the capital of Japan, is one of the three largest cities in the world. In the twelth century, Japan’s capital was an island city named Kyoto. Six hundred years later, many people from Kyoto had moved to a city called Eyed. They had renamed it Tokyo and had made this city the capital of all Japan. ​Today, Tokyo is a busy place. It is a center for business and education. It is also a center for religion. In addition, Tokyo University, the beautiful ground of the Imperial Place, the famous Imperial Hotel, built in 1920 by an American, Frak Lloyd Wright, and many fine shops, stores, theaters and eating places can be found in this capital.​ 1. Which city was the capital of Japan in the 12th century? …………………………………………………………………………………………………...... 2. Is Tokyo a center for business, education and religion? …………………………………………………………………………………………………...... 3. Who built the Imperial Hotel? …………………………………………………………………………………………………...... II. Complete the passage with the words given in the box. ​there​​popular​cartoon​channel​programme​​ ​Television first came some sixty years ago in the 1950s. Nowadays, it is one of the most (1) ………………... sources of entertainment for both the old and young. Television brings (2) …………… for children, world news, music and many other (3) ………............. If someone likes sports, he can just choose the right sports (4) ……………….. It is not difficult for us to see why (5) ………………… is a TV set in almost every home today. D. WRITING (2ms) I. Find and underline the mistake in each sentence then correct it. 1. Japan is one of the best expensive countries in the world. ………………………………………………………………………………………………………. 2. We watched the cartoon “Tom and Jerry” many times. ………………………………………………………………………………………………………. II. Rewrite the sentences without changing the meaning. 1. There are a lot of interesting programmes on VTV3. VTV3 ………………………………………………………………………………………………... 2. Minh is more intelligent than any other students in our class. Minh is ………………………………………………………………………………………………. III. Use the conjuntion in the parentheses to connect the sentences. (0,5m) 1. Watching too much TV is not good for your health. It hurts your eyes. (because) ………………………………………………………………………………………………………. 2. She loves FrenchFood. She goes to that French restaurant every week. ………………………………………………………………………………………………………. IV. Rearrange the words to complete the sentences. (0,5m) 1. are / the / Olympic Games / how often / held? ………………………………………………………………………………………………………. 2. are / time / great / having / a / we / in Cambodia. ……………………………………………………………………………………………………….

Find the word which has a different sound in the underlined part 1. A. brother​​​B. think​​​C. there​​​D. weather 2. A. show​​​B. slow​​​C. comedy​​​D. motor 3. A. hear​​​B. bear​​​C. near​​​D. appear 4. A. prepare​​​B. hair​​​C. fare​​​D. speaker II. Choose the best answer. 1. My sister can’t swim …………………. She’s afraid of water. A. because​​​B. and​​​​C. but​​​​D. so 2. …………. is the weather forecast programme on? – At 7.30 pm every day. A. What​​​B. How​​​C. Whe​​​D. Where 3. Last summer, I …………. Finishing with my uncle in the afternoon. A. go​​​​B. went​​​C. goes​​​D. going 4. VTV is a ………… television channel in Viet Nam. A. wide​​​B. local​​​C. international​​D. national 5. I like watching football matches, but I am not very good ………. playing football. A. in​​​​B. with​​​C. at​​​​D. of 6. …………… eat too much salt. It’s not good for you. A. Do​​​​B. Don’t​​​C. Please​​​D. Can’t 7. Do you know the most ………. drink in Viet Nam? A. popular​​​B. cheap​​​C. hot​​​​D. best 8. Have you ever …………. to Manchester? A. be​​​​B. been​​​C. being​​​D. went

Bài 1: viết PTHH thực hiện các sơ đồ chuyển hóa sau a, HCL----->,HNO3,---->Mg( NO3)2, b,H3PO4, ----> NaPO4 c, H2SO4--->HCl--->Fecl3 Bài 2 hào tan 16g CuO trong 300g dung dịch HCl 7,3%thu được dung dịch A.tính C% các chất tan trong dung dịch A

Giúp tớ vs cần gấp tớ sẽ vote cho nhé

Verbs form Help me R mk chấm điểm cho & vote cho câu trả lời hay nhất

Order the words to make indirect questions. 1. Direct: Where's your brother? Indirect: is? / Have / idea / where / you / any / idea / brother / your ........................................................................................................... 2. Direct: Is your friend at home? Indirect: you / home? / know / Do / at / your / if / friend / is .......................................................................................................... 3. Direct: Is she an artist? Indirect: if / she's / Do / artist? / know / you / an

câu hỏi : a,dat cac cum danh tu co trung tam la nhung tu sau day nhan dan, meo, dong bao, xe,nuoc, ban ghe b,nhan xet cac phu ngu truoc va sau cac danh tu da cho (minh ko viet hoa duoc)