lập niên biểu các giai đoạn của cuộc khởi nghĩa chống Pháp của đồng bào miền núi
cho tứ giác ABCD, có hai đường chéo AC và BD vuông góc với nhau và cắt nhau tại O. Từ O kẻ OK vuông góc với DC; OK kéo dài cắt AB ở I. Chứng minh rằng nếu: góc BAC = góc BDC thì IA = IB và ngược lại.
Cho tam giác ABC cân A, kẻ AD vuông góc BC. Chứng minh tia phân giác của góc A
Qua điểm A nằm bên ngoài đường tròn (O), kẻ hai tiếp tuyến ABC, AMN. Hai đường thẳng BN và CM cắt nhau ở S. CM: a) A + bsm = 2CBN b) AM + AN = AB. AC
I. Fill in each gap in the sentences with a suitable adjective from the box : difficult, welcome, shocked, impossible, willing, careful, lucky, motivated, anxious, content 1. Are you __________________ to accept responsibility ? 2. She was __________________ to hear her children falling from the tree. 3. You’re _________________ to use my car. 4. You’re very ___________________ to be alive after that accident. 5. It’s virtually __________________ to predict the weather accurately. 6. It’s ___________________ to climb that high and steep hill. 7. Be __________________ not to walk on the sidewalks ! 8. These students are _________________ to learn English. 9. The children are ________________ to go to the circus. 10. He was ________________ to stay at home and read a book. II. Fill in each gap with the correct passive form of the verb from the box : A. FORM : answer, make, send, open, use, build, hold, sign, clean, recycle 1. This room will ________________ later. 2. This parcel mustn’t _____________________ until Christmas. 3. Tea can ___________________ with hot water. 4. Tires can _____________________ to make pipes or floor coverings. 5. Applications should ___________________ before December 30th. 6. A meeting will ___________________ before Teacher’s Day. 7. The new bridge is going to __________________ by the end of the year. 8. Cloth bags should ________________ instead of plastic bags. 9. This question can _________________ by most of the students. 10. This contract must __________________ by the manager today. III. TENSE : publish, build, pollute, injure, make, paint, plant, play, cut 1. Football _____________________ all over the world. 2. Millions of cars _____________________ in Japan every year. 3. How many languages _____________________ in Canada ? 4. Lots of trees _____________________ down last year. 5. The ceiling _____________________ on. 6. His best work _____________________ next year. 7. She ___________ seriously _______________ last night. 8. Two more bridges _____________________ in this area next month. 9. Our environment _____________________ by chemicals at present. 10. Young trees _____________________ in the school garden by seventh form students last week.
Cho tam giác ABC vuông tại A , AB=3cm , AC=4cm , và tam giác MNP vuông tại M , MN=15cm , NP=25cm (vẽ hình) a)Tính độ dài các đoạn thẳng BC , MP b)Tam giác ABC có đồng dạng với tam giác MNP không ? Tại sao ? c)Tính tỉ số diện tích hai tam giác ABC và MNP , so sánh tỉ số này với tỉ số đồng dạng của hai tam giác
ài 2: Một xe tải khối lượng 2 tấn, bắt đầu chuyển động nhanh dần đều sau khi đi được quãng đường 144m thì vận tốc đạt được 12m/s. Hệ số ma sát giữa xe và mặt đường là μ = 0,05. Tính công của các lực tác dụng lên xe trên quãng đường 144m đầu tiên. Lấy g = 10m/s2.
Giúp mình với help me Cảm ơn nhiều
REARRANGEMENT A. TRANSFORMATION 1. The Browns go to work by bus. They want to save natural resources. ® In order to 2. I took off my shoes. I didn’t want to make any noise. ® I took off my shoes so as 3. The police came here because they wanted to investigate the causes of the accident. ® The police came here so as 4. Because my children don’t want to be late for school, they get up early. (in order not to) ® My children _____________________________________________________ 5. She wants you to help her clean the windows. ® Can you 6. I learn English so that I can communicate with foreigners. ® I learn English so as ______________________________________________ 7. I want you to give me a bandage. ® Could _________________________________________________________? 8. Do you want me to drive? ® Shall I? 9. I want you to help me carry my bag? ® Can you? 10. Turn down the TV, please. ® Will you _______________________________________________________? 11. Keeping the environment clean is very important. ® It's 12. They will show the time machine to the public when they finish. ® The time machine 13. He was delighted to receive his aunt’s letter. ® He was 14. Old car tires are recycled to make shoes and sandals. ® People 15. I'm very sad that I wasn't accepted in that group ® I'm very sad 16. We can use the garbage to make fertilizer. ® The garbage 17. We should reuse plastic bags. ® Plastic bags 18. People speak English all over the world. ® English 19. We should use cloth bags instead of plastic bags. ® Cloth bags 20. Bell invented the telephone in 1876. ® The telephone B. REARRANGEMENT 1. her bike/ fell off/she/on the road/and hit her head. ® She 2. be there/ will/ the ambulance/ about 10 minutes/in. ® The ambulance 3. blankets or coats/overheat/don’t/the victim/with ® Don’t 4. the burns immediately / tissue damage/ cool/ minimize/so as to. ® Cool 5. ease the pain/should/you/ ice or cold water packs/ with. ® You 6. first-aid/people/ease the victim’s pain/use/in order to. ® People 7. vegetable matter/into/we make/and fertilise our fields/compost. ® We make 8. compost /farmers/ collect household/garden waste /and/to make . ® Farmers 9. can be/ milk bottles/being cleaned/after/recycled. ® Milk bottles 10. in June/ we are/seeing you/looking forward /to. ® We are 11. environmentally friendly products/in order to/our beautiful environment/try to use/protect. ® Try to use 12. are thrown away/every single year/old car tires /of/Millions. ® Millions
ông Hai trong truyện ngắn làng của kim lân được xây dựng cới 1 tính cách khác đặcbiệt - ông hay khoe về làng ngay cả khi làng bị đốt. EM hiểu được điều gì về con người ông 2
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