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nhatuzuma
2 năm trước
Bài 6: Cho tam giác ABC nhọn (AB < AC). Đường tròn tâm O, đường kính BC lần lượt cắt AB, AC tại M và N; BM và CN giao nhau tại H, AH cắt BC tại K. a) Chứng minh: AK ⊥ BC. b) Chứng minh: AM.AB = AN.AC c) Chứng minh: MH là phân giác góc NMK. d) MN và BC cắt nhau tại S. Chứng minh: SB.SC = SK. SO
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In each exercise put a suitable word in each blank space. 1. He reached there ___at__ four o'clock __in___ the afternoon __on___ Monday. 2. __On___ Tuesday I must be there ___at__ six o'clock ____in_ the evening. 3. I stopped _____ his house for a little while _____ the middle _____ a storm _on____ Sunday. 4. _____ my opinion you can rely _____ him to come _____ noon. 5. I saw him looking _____ some books __in___ the library __on___ Saturday. His brother was _____ him. 6. I posted the parcel _____ the main Post Office _____ Market Road _on____ Tuesday. 7. It won't fall _____ because I have twisted the wire _____ that post to keep it _____ position. 8. ____ Sunday I was woken up ____ the sound of the radio ____ my brother's room. It was ____ much too loudly. 9. He was injured _____ the left arm _____ the accident. 10. I was surprised _____ the way _____ which he acted. 11. The lorry was moving _____ full speed when the load fell _____ 12. We reached the city _____ about ten o'clock _____ the morning. 13. We parked our car _____ the side _____ the road. 14. There is plenty _____ tin left _____ that mine. 15. We threw the net _____ the river and sat _____ to wait. 16. There is a waterfall farther _____ the river. You can see the foam floating down _____ us. 17. Sunday is the day _____ which he goes _____ church. 18. _____ most Saturdays I go fishing _____ my brother. 19. My friend used to go to school _____ his bicycle but now he comes _____ bus or _____ taxi because he lives farther _____. 20. Some of the boxes _____ the lorry were not tied _____ firmly. 21. Sometimes I read _____ my room _____ the evening. 22. _____ the last two weeks I have spent most of my spare time _____ my hobby which is stamp-collecting. 23. You can catch plenty _____ fish _____ this method. 24. The passengers _____ the taxi were worried _____ the speed. 25. I'll see you next Sunday, that is _____ the fifth of May. 26. He turned _____ the radio and tuned _____ to BBC. 27. Some of us will be going _____ bus and some _____ our bicycles. 28. I visited my friend _____ whom I had made an appointment. 29. We arrived _____ the place _____ which we had come _____ the previous picnic. 30. I listened _____ some music _____ the radio. 31. I accompanied my uncle _____ a hunting trip _____ the jungle. 32. We camped _____ that island _____ two days. 33. When I went _____ a walk early _____ the morning, the breeze blew _____ my face. 34. We put the luggage _____ the back of the car and then set _____ _____ our journey. 35. We went to a party _____ which we enjoyed ourselves. 36. I took some photographs _____ my camera. 37. The lorry knocked _____ the back of our bus ______ accident. 38. He is interested _____ sport so when he reads the newspaper he does not bother _____ the local news except _____ the results _____football and hockey matches. 39. I called _____ Ali's house yesterday to see if he had recovered _____ his illness. He was still suffering _____ stomach-ache. 40. We ate our food _____ a shady spot and then packed everything _____ so that we were ready _____ go home.

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