Lâu lắm r hok onl :))) vẽ chibi

Phân biệt: $H_{2}$,$O_{2}$,$CH_{4}$,$C_{2}$$H_{4}$, $C_{2}$$H_{2}$

cạnh góc vuông nhỏ của 1 tam giác vuông kém cạnh góc lớn là 7m . Nếu tăng cạnh góc vuông nhỏ 3m , giảm cạnh góc vuông lớn là 2m . Thì diện tích tam giác vuông tăng lên 10 mét vuông . tính độ dài 2 cạnh góc vuông

Your friend, Mark, wants to visit Viet Nam. Write a letter to tell him a natural wonder of Viet Nam you like

Tìm GTLN,GTNN của a)y=x+2/x^2+3x+3 b)y=x+1/2x^2-x+1

I. Using the verbs in brackets, write sentences in the passive voice. 1. The Temple of Literature/ in the centre of Ha Noi about 2 kilometres west of Hoan Kiem Lake. (locate) >………………………………………………………………………………….. 2. Many precious relics/ in the Temple of Literature (display) >…………………………………………………………………………………… 3. Many trees and flowers/ the gardeners (take care of) >…………………………………………………………………………………… 4. The Temple of Literature/ one of the most important cultural and historic places/ in Viet Nam. (consider) >……………………………………………………………………………………. 5. Lots of souvenirs/ inside the Temple of Literature (sell) >……………………………………………………………………………………. 6. Khue Van pavillion/ the symbol of Ha Noi (regard) >……………………………………………………………………………………. 7. The Temple of Literature/ in 1070 (found) >……………………………………………………………………………………. 8. The Imperial Academy / under Emperor Ly Thanh Tong (construct) >……………………………………………………………………………………. 9. The Doctors’ stone tablets/ King Le Thanh Tong (erect) >…………………………………………………………………………………… 10. The imperial Academy/ the first university/ in Viet Nam (regard as) >………………………………………………………………………………….. 11. In 1483 the Imperial Academy/ Thai Hoc Vien (rename) >………………………………………………………………………………….. 12. The 82 Doctors’ stone tablets/ UNESCO (recognise) >…………………………………………………………………………………. II. Choose the best answer. 1. Oxford University is……………… one of the best university in the UK. A. Considered B. regarded C. built D. constructed 2. Lan’s school is ……………… Chu Van An Lower Secondary School. A. Considered B. built C. regarded D. named 3. English is……………. all over the world. A. Spoken B. speak C. spoke D. speaked 4. Thong Nhat Palace is………………… at 106 Nguyen Du street, District 1, Ho Chi Minh City. A. Constructed B. renamed C. surrounded D. located 5. Ha Long Bay was first………………… as a World Heritage Site by UNESCO in 1994. A. Sold B. grown C. regarded D. seen 6. All the tickets for the trip to the Temple of Literature………………… A. Sell B. sold C. were sold D. is sold 7. Look! The trees and flowers ………………. care of by the gardeners of the Temple of Literature. A. are being taken B. taken C. were taken D. is taken 8. My father ………………. The head master of Chu Van An Lower Secondary School. A. Choose B. is chosen C. are chosen D. chose 9. My sister …………………. A scholarship to Cambridge University. A. May offer B. will offer C. is offered D. offered 10. The souvenirs and postcards inside the Temple of Literature ……………. to you at a higher price by the shopkeeper. A. Sold B. sell C. was sold D. were sold 11. The students in the university ……………. By famous lecturers and tutors. A. Are taught B. are learned C. are studied D. are played 12. A new university …………….. in my town in the near future. A. Is built B. will be built C. was built D. has been built 13. The government ………………. These people the right to settle near the university. A. Is given B. will be given C. was given D. has given 14. The police surrounded the house. A. The house is surrounded by the police B. The house was surrounded by the police. C. The house are surrounded by the police. D. The house were surrounded by the police. 15. Yesterday the thieves stole everything in it. A. Yesterday everything in it is stolen by the thieves. B. Yesterday everything in it are stolen by the thieves. C. Yesterday everything in it was stolen by the thieves. D. Yesterday everything in it were stolen by the thieves.

a) (-2).(-6)2 + 3(-2)3 - 62 c) -23.63+ 23.21- 58.23

Tìm một số biết rằng lấy số đó nhân với 435 rồi trừ đi 179 thì được 8956

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