cho phuong trình bậc hai ax2 + bx+ c =0 có hai nghiệm x1,x2 deu khác 0 . phương trình bậc hai nhận 1/x1 và 1/x2 làm nghiệm là: Nhờ mọi người làm mấy câu dưới nữa à

Phân tích thái độ của Anh, Pháp, Mĩ, Liên Xô trước khi xảy ra chiến tranh.Từ đó rút ra bài học trong việc ngăn chặn nguy cơ dẫn đến chiênd tranh

Cho tam giác ABC vuông tại A (AB<AC) có đường cao AH. Gọi E,F lần lượt là hình chiếu của H lên AB,AC. CMR: BE √CH +CF √BH =AH √BC

nêu chức năng của lưỡi thực quản và dạ dày trong sự tiêu hóa

Tự liên hệ bản thân em trong cuộc sống em đã tôn trọng quyền trẻ em của mình và của người khác như thế nào

I/ Change these sentences into the passive voice 1. Somebody has robbed the bank near our house. …………………………………………………………….……………………………………… 2. Somebody told me to wait outside. …………………………………………………………….……………………………………… 3. Somebody has driven them to the airport. …………………………………………………….……………………………………………… 4. They will complete the new high way from north to south next year. …………………………………………………….……………………………………………… 5. My aunt made this sweater for her son. …………………………………………………….……………………………………………… 6. The television station has broadcast all the 22nd Sea-Games competitions. …………………………………………………….……………………………………………… 7. My teacher asked me to be here at 10 am. …………………………………………………….……………………………………………… 9. Thomas Edison invented the electric light bulb. …………………………………………………….……………………………………………… 10. She makes coffee for her parents every day. …………………………………………………….………………………………………………

Mình muốn hỏi hết tất cả

V. Read the following passage and then fill in each blank with the correct word from the list was called than to suddenly gave It (1)…… Uncle Jim’s birthday today so he came and had lunch with us. It was sunny so we ate in the garden. We (2)……………him the presents and then we all went to the new cinema. It’s much bigger and better (3)…………… the old one. We saw a film which was (4)………………. “Pyramid”. In one part of the film someone(5)………………….. jumped out of the box. We were all afraid. After the film, Uncle Jim took us all (6)…………… his favorite restaurant and I had a pizza. It was excellent! VI. Rewrite the following sentences to have the same meaning 3 1. People make many famous films in Hollywood. →Many .…………………………………………………………………….. 2. Football is more exciting than volleyball. → Volleyball isn’t …………………………………………………………… 3. I like orange juice best. →My favourite ……………………………………………………………… 4. My school isn’t the same as my sister’s. →My sister’s school is…………………………………………………….

Directions: Underline the object of the verb if the given sentence has one. Then change the sentence to the passive. Some sentences cannot be changed to the passive. ACTIVE PASSIVE 1. A noise awakened me. 1 2. It rained hard yesterday. 2 3. Alice discovered the mistake. 3 4. We stayed at a hotel last night. 4 5. I slept only four hours last night. 5 6. Anita fixed the chair. 6 7. Did Susan agree with Prof. Hill? 7 8. Ann's cat died last week. 8 9. That book belongs to me. 9 10. The airplane arrived twenty minutes late. 10 11. The teacher announced a quiz. 11 12. I agree with Larry. 12 13. Do you agree with me? 13 14. Jack went to the doctor's office. 14

Giúp em với ah !!!!!!!!!!!!!!!! Biết rằng số abc khi phân tích ra thừa số nguyên tố có thừa số 3 và thừa số 7. Chứng tỏ a + 19b + 4c cũng có tính chất đó.