Cho tam giác ABC đều ngoại tiếp đường tròn (O; 2cm), có ba tiếp điểm ứng với ba cạnh AB, AC, BC với đường tròn lần lượt là M, N, Q. a/ Tính số đo góc BOC. b/ Tính độ dài cạnh BC

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Give the correct from of the verb in bracket 1.children should't(tet)_________ fire work at tet holiday. 2.students must (go) ________ to school on time 3.where John (be) ________? He (read) _______books in the library he(go) ________to the library Twice a week. Giải giúp với

1. What do you do in free time? - I often............. skating with my friends 2. What are .......................................a cabbage. 3. They are ................. the apple tree. They may fall. 4. Maria likes.................. book in her free time. 5. He'd like to.................. in the mountains. 6. I have a pain in my back. I have a...................... 7. My father has a pain in his ear. He has a ................

2,97x0,128 mn đặt tính giúp e

) Cho đường tròn (O; R). Vẽ hình vuông ABCD nội tiếp đường tròn (nêu cách vẽ) và tính độ dài cạnh của hình vuông ABCD theo R

Các bạn giải giúp mình các bài tập này với ạ đó mình kh mang sách vở về nhà nên kh làm được ạ Mình cảm ơn

Câu 1:Cho biểu thức A=: 2n +1 .Tìm tất cả các giá trị nguyên củan đề A có giá trị tự nhiên? là một số A. {-6;-1;1;5} B.{-6;-1;0;5} C. {-6;-1;5} D.{0;5}

Giúp mình với mọi người ơi! REVISION UNIT 9 & 10 I. Choose the word in each group that has the underlined part pronounced differently from the rest. 1. A. dear B. clear C. year D. bear 2. A. wear B. where C. pair D. here 3. A. floor     B. tour     C. usually     D. casual 4. A. bomb B. comb C. climb D. about 5. A. buld B. tomb C. black D. cab 6. A. pine B. psychology C. plane D. pick II. Choose a word in each line that has different stress pattern 7. A. mysteries B. satellite C. organism D. entrapment 8. A. investigate B. population C. diversity D. technology 9. A. starfish B. maintain C. dolphin D. offspring 10. A. defence B. cancer C. species D. damage 11. A. gestation B. erosion C. animal D. variety 12. A. reconstruction   B. vegetation C. destruction D. circulation III. Choose the best option among A, B, C or D. 13. Thanks to modern technology, scientists have been able to ________ the life of plants and animals that live under the sea. A. investigate B. provide C. challenge D. maintain 14. The shrimp is a kind of ________. A. krill B. fish C. plant D. mammal 15. Whales, seals are examples of  ________ animals. A. river B. tiny C. marine D. land 16. The life ________ of sperm whale can be up to seventy years. A. distance B. period C. length D. span 17. ________ is the variety of different types of plant and animal life in a particular region. A. Interaction B. Herbicide C. Environment D. Biodiversity 18. If I ________ you, I wouldn't buy that coat. A. would be B. were C. am D. was 19. Tam ________ more if he ________ more time. A. would read - has B. will read -had C. would read - had D. read - had 20. If I didn't want to go to the party, I ________ go. A. didn't B. won't C. don't D. wouldn't 21. I think you ________ aplogize for your behaviour. A. shall B. have C. should D. ought 22. I wonder where Mai is. She should ________ here by now. A. being B. to be C. have seen D. be 23. You look so tired. You ________ go to see the doctor. A. can       B. should          C. ought D. might 24. About 000 species of plants and animals ________ each year. A. are already been eliminating B. has already been eliminated C. are already being eliminated D. have already eliminated 25. They haven't stamped the letter. A. The letter hasn't been stamped B. The letter hasn't got stamped C. The letter hasn't be stamped D. The letter wasn't been stamped 26. The earth is being ________ and the future looks bad. A. threatened B. threat C. threatening D. threaten 27. Many laws ________ in nature's defence. A. were being passed B. are passing C. are passed D. have passed 28. Water ________ most of the earth's surface. A. is covering B. being covered C. covers D. is covered

làm gúp mình bài 1 với bài 3 với