Điền dấu câu thích hợp vào ô trống: Vầng trăng sáng quá Vườn rau nhà em xanh mướt, tươi tốt

Bài 3: Một đội tuyển thể thao có105 người trong đó có 42 vận động viên nam.Ti số phần số vận động viên nam và số vận động viên toàn đội là bao nhiêu?

Nhanhh nào mn Hôm nay mik cần rồi

Một bóng đèn có ghi số liệu kĩ thuật là 220V - 75W. Em hãy nêu cách sử dụng để đảm bảo đèn tăng tuổi thọ *giúp mình với mn ơi!!😢

I. Complete each sentence with one suitable preposition. 1. The new policy has led…………….. three major strikes in the city today. A. to B. in C. for D. at 2. The poisonous chemical waste is dumped……………..the river. A. to B. into C. for D. at 3. Scientists have come up…..new ways of saving money. A. with B. in C. for D. at 4. The oil spill resulted …….the death of thousands of fish in this sea. A. to B. in C. for D. at II. Complete the sentences with the types of pollution. 5.  …………….. occurs when the atmosphere contains gases, dust, or fumes in harmful amounts. 6. When radiation goes into the land, air or water, it is called…………….. 7. Too much use of electric lights in cities may cause…………….. 8. …………….. happens when human activities destroy the Earth's surface. 9. …………….. is the contamination of lakes, rivers, oceans, or groundwater, usually by human activities. 10. …………….. occurs because there are too many loud sounds in the environment. 11. The sight of too many telephone poles, advertising billboards, overhead power lines, or shop signs may cause…………….. 12. When…………….. happens, the water temperature in streams, rivers, lakes, or oceans changes. III. Put the verbs in brackets into the correct form. 13. Our garden is so beautiful. There (not be) …………….. any flowers if my sister (not take care) ……………….. of it every day. 14. If I (be) …………….. you, I (wear) …………….. earplugs when going to the concert. IV. Rewrite these sentences beginning with the words given, using if-clauses. 15. Dick can’t find the way because he doesn’t have a map.  If 16. I can’t send her the letter because I don’t know her email address.  If 17. He is not a doctor, so he can’t help me.  If 18. She can’t send her children to school because she is poor.  If 19. Nam doesn’t study hard. Therefore, he fails the exam.  If

gt của x để 1/[(x+1)^2+5] đạt gt lớn nhất

viết một đoạn văn miêu tả tâm trạng của Dế Mèn trước cái chết của Dế Choắt

chưa động từ trong ngoặc you. tim to the concert (train)

Mọi người giải giúp em vs ạ! Em sẽ đáng giá 5 sao! :D

Ex1 : Many people worked to create television. In 1862, Abbe Giovanna Caselli invented a machine called the Pantelograph. Caselli was the first person to send a picture over wires. By the 1880s, Alexander Graham Bell invented a machine that transmitted pictures and sound over wires. His machine was called the Photophone. The World’s Fair was held in Paris, France, in the year 1900. The first International Congress of Electricity was held at the World’s Fair. That was when the word television was first used - by a Russian named Constantin Perskyi. That name stuck, and is now shortened to "TV." At the beginning of TV history, there were several types of TV technology. One system was a mechanical model based on a rotating disc. (Rotating discs are discs that spin like CDs.) The other system was an electronic model. In 1906, Boris Rosing built the first working mechanical TV in Russia. In the 1920s, John Logie Baird in England and Charles Francis Jenkins in the United States demonstrated improved mechanical systems. Philo Taylor Farnsworth also showed an electronic system in San Francisco in 1927. His TV was the forerunner of today’s TV, which is an electronic system based on his ideas. Now TV is everywhere. Before 1947, there were only a few thousand televisions in the U.S. By the 1990s, there were televisions in 98% of American homes. 1.A system is a combination of... 2.The word television was first used in... 3.Who first sent a picture over wires? 4.Who invented the Photophone? 5.The best synonym for demonstrated is... Ex2 : Television is one of man’s most important means of communication. It brings pictures and sounds from (1) ........ the world into millions (2)........homes. A person with a television set can sit in his house and watch the President make a (3).........or visit a foreign country. He can see a war being fought and watch statemen try to bring about peace. Through television, home viewers can see and learn about people, places and things in (4)............lands. Television even takes its viewers out of this world. It brings them (5)........ of America’s astronauts as the astronauts explore outer space. 1.Choose the best answer for the blank numbered (2) in the reading passage 2.Choose the best answer for the blank numbered (5) in the reading passage 3.Choose the best answer for the blank numbered (4) in the reading passage 4.Choose the best answer for the blank numbered (1) in the reading passage 5.Choose the best answer for the blank numbered (3) in the reading passage