1, tìm hai số tự nhiên sao cho khi lấy tổng, hiệu (số lớn trừ số nhỏ) tích thương (số lớn chia số nhỏ) của hai số đó cộng lại ta được kết quả là 245 giải bài toán bằng cách lập phương trình

Question 1. [NB] Choose the word whose underlined part is pronounced differently from the others. A. development B. relate C. mention D. technology Question 2. [NB] Choose the word whose underlined part is pronounced differently from the others. A. climate B. sighting C. might D. aliens Question 3. [NB] Find the word which does not belong to the group. A. atmosphere B. powerful C. condition D. astronaut Question 4. [NB] Find the word which does not belong to the group. A. untreated B. aquatic C. pollution D. electronic Question 5. [TH] Choose the correct option A, B, C, or D for each gap to complete the following passage. Many human activities over the last 200 years have been responsible (5) ________ polluting the air and damaging people’s health. Automobile engines and power plants burn combustible (6) ________ like gasoline and coal and allow toxic gases and smoke to escape into the air. Some pollutants destroy the ozone layer, which is the thin blanket of gases that (7) ________ Earth from the Sun’s dangerous ultraviolet rays. Other pollutants contribute to (8) ________ warming by adding to the planet’s natural greenhouse effect. A. for B. of C. to D. with Question 6. [TH] Choose the correct option A, B, C, or D for each gap to complete the following passage. Many human activities over the last 200 years have been responsible (5) ________ polluting the air and damaging people’s health. Automobile engines and power plants burn combustible (dễ cháy) (6) ________ like gasoline and coal and allow toxic gases and smoke to escape into the air. Some pollutants destroy the ozone layer, which is the thin blanket of gases that (7) ________ Earth from the Sun’s dangerous ultraviolet rays. Other pollutants contribute to (8) ________ warming by adding to the planet’s natural greenhouse effect. A. chemicals B. means C. fuels D. matters

Làm giúp mình với ạ, mình đang cần nộp trong ngày mai, cảm ơn mọi người

Hai thành phần mang điện trong nguyên tử là?

Bài 1: Khoanh vào chữ cái trước câu trả lời đúng a)Số thập phân gồm có 3 trăm, 4 đơn vị, 5 phần mười và 6 phần nghìn được viết là: A. 34, 56 B. 304, 56 C. 304, 506 D. 34, 506 b) Một người đi xe đạp được 50 km trong 2 giờ 30 phút. Vậy vận tốc đi xe đạp của người đó là: A. 25 km/giờ B. 125 km/giờ C. 30 km/giờ D. 20 km/giờ c) 75% của một số là 4,2. Vậy số đó là bao nhiêu ? A. 3,15 B. 31,5 C. 5,6 D. 56 Bài 2: Điền chữ hoặc số thích hợp vào chỗ chấm a) 2m385dm3 = …………………m3 b) Có 39 bi xanh và 13 bi đỏ. Vậy tỉ số phần trăm số bi xanh so với tổng số bi là: ....................................... Bài 3: Cho nửa hình tròn N như hình bên. Chu vi của hình N là: ( một nửa hình tròn có đường kính là 4 cm nha ) A. 10,28cm B. 6,28cm C. 16,56cm Bài 4. Đúng ghi Đ, sai ghi S vào ô trống: a) 20% + 5,6% = 24,6% ▭ b) 61% - 5,6% = 50,6% ▭ c) 0,095kg = 9,5g ▭ d) 0,57m = 5,7dm ▭

Giúp tớ với nhé các cậu tớ đang cần gấp ạ

Question 14. [TH] Read the text and choose the correct answer A, B, C, or D for each of the questions. John Logier Baird, The Father of Television John Logier Baird, who is called “the father of television”, was born in Scotland in 1888. He became an inventor at the age of 26. His first inventions were electrically-heated socks and air-filled shoes, but these were not very successful. However, in 1923, he became interested in the idea of pictures by radio. He worked for several months, and the following year he succeeded in transmitting the first “television” picture a few meters across the room. Baird’s “television” was not very clear, but people were very interested and he tried to make it better. In 1926, he showed it to the public at the Royal Society. In 1928, he transmitted the first picture across the Atlantic and in 1929, the BBC and the German post office began to broadcast TV with his system. Which of the following is not true? A. Baird’s first inventions were not very successful. B. The first ‘‘television’’ was not clear. C. People weren’t interested in Baird’s “television”. D. Baird’s system was used by the BBC and the German post office. Question 15. [NB] Choose the best option A, B, C, or D to complete each sentence. If it rains, we ________ the match. A. cancel B. will cancel C. cancelled D. cancelling Question 16. [TH] Choose the best option A, B, C, or D to complete each sentence. Australia has the biggest _________ in the world. A. natural beauty B. puzzling games C. cattle station D. population Question 17. [TH] Choose the best option A, B, C, or D to complete each sentence. The USA has a population of about 304 million, and it’s the third _______ country in the world. A. smallest B. largest C. narrowest D. highest Question 18. [NB] Choose the best option A, B, C, or D to complete each sentence. If the factory __________ dumping poison into the lake, all the fish and other aquatic animals will die. A. will continue B. to continue C. continue D. continues Question 19. [NB] Choose the best option A, B, C, or D to complete each sentence. The woman sitting next to me on the plane was very nervous. She __________ before. A. hasn’t flown B. hadn’t flown C. didn’t fly D. doesn’t fly

có mỗi một câu nên giải thích chi tiết nhé

Question 10. [TH] Read the text and choose the correct answer A, B, C, or D for each of the questions. John Logier Baird, The Father of Television John Logier Baird, who is called “the father of television”, was born in Scotland in 1888. He became an inventor at the age of 26. His first inventions were electrically-heated socks and air-filled shoes, but these were not very successful. However, in 1923, he became interested in the idea of pictures by radio. He worked for several months, and the following year he succeeded in transmitting the first “television” picture a few meters across the room. Baird’s “television” was not very clear, but people were very interested and he tried to make it better. In 1926, he showed it to the public at the Royal Society. In 1928, he transmitted the first picture across the Atlantic and in 1929, the BBC and the German post office began to broadcast TV with his system. John Logier Baird ___________. A. is called “the father of television” B. was born in Scotland in 1888 C. was an inventor D. all are correct Question 11. [TH] Read the text and choose the correct answer A, B, C, or D for each of the questions. John Logier Baird, The Father of Television John Logier Baird, who is called “the father of television”, was born in Scotland in 1888. He became an inventor at the age of 26. His first inventions were electrically-heated socks and air-filled shoes, but these were not very successful. However, in 1923, he became interested in the idea of pictures by radio. He worked for several months, and the following year he succeeded in transmitting the first “television” picture a few meters across the room. Baird’s “television” was not very clear, but people were very interested and he tried to make it better. In 1926, he showed it to the public at the Royal Society. In 1928, he transmitted the first picture across the Atlantic and in 1929, the BBC and the German post office began to broadcast TV with his system. One of Baird’s first inventions was __________. A. air-filled shoes B. electrically-heated socks C. radio D. A & B Question 12. [TH] Read the text and choose the correct answer A, B, C, or D for each of the questions. John Logier Baird, The Father of Television John Logier Baird, who is called “the father of television”, was born in Scotland in 1888. He became an inventor at the age of 26. His first inventions were electrically-heated socks and air-filled shoes, but these were not very successful. However, in 1923, he became interested in the idea of pictures by radio. He worked for several months, and the following year he succeeded in transmitting the first “television” picture a few meters across the room. Baird’s “television” was not very clear, but people were very interested and he tried to make it better. In 1926, he showed it to the public at the Royal Society. In 1928, he transmitted the first picture across the Atlantic and in 1929, the BBC and the German post office began to broadcast TV with his system. Baird was interested in the idea of pictures by radio at the age of ___. A. 26 B. 35 C. 38 D. 40 Question 13. [TH] Read the text and choose the correct answer A, B, C, or D for each of the questions. John Logier Baird, The Father of Television John Logier Baird, who is called “the father of television”, was born in Scotland in 1888. He became an inventor at the age of 26. His first inventions were electrically-heated socks and air-filled shoes, but these were not very successful. However, in 1923, he became interested in the idea of pictures by radio. He worked for several months, and the following year he succeeded in transmitting the first “television” picture a few meters across the room. Baird’s “television” was not very clear, but people were very interested and he tried to make it better. In 1926, he showed it to the public at the Royal Society. In 1928, he transmitted the first picture across the Atlantic and in 1929, the BBC and the German post office began to broadcast TV with his system. Baird’s “television” was introduced to the world in _______. A. 1923 B. 1926 C. 1928 D. 1929

Question 6. [TH] Choose the correct option A, B, C, or D for each gap to complete the following passage. Computers are helpful in many ways. First, they are fast. They can work with information even (5) __________ than a person. Second, computers can work with a lot of information at the same time. Third, they can store information for a long time. They do not forget things that the common people do. (6) __________, computers are almost always correct. They are not perfect, but they usually do not make mistakes. Recently, it is important (7) __________ about computers. There are a number of things to learn. Many companies have computers at work. In addition, most universities (8) __________ day and night courses in Computer Science. Another way to learn is from a book, or from a friend. After a few hours of practice, you can (9) __________ with computers. NUMBER 6 A. finally B. finish C. final D. finishing Question 7. [TH] Choose the correct option A, B, C, or D for each gap to complete the following passage. Computers are helpful in many ways. First, they are fast. They can work with information even (5) __________ than a person. Second, computers can work with a lot of information at the same time. Third, they can store information for a long time. They do not forget things that the common people do. (6) __________, computers are almost always correct. They are not perfect, but they usually do not make mistakes. Recently, it is important (7) __________ about computers. There are a number of things to learn. Many companies have computers at work. In addition, most universities (8) __________ day and night courses in Computer Science. Another way to learn is from a book, or from a friend. After a few hours of practice, you can (9) __________ with computers. NUMBER 7 A. know B. knew C. knowing D. to know Question 8. [TH] Choose the correct option A, B, C, or D for each gap to complete the following passage. Computers are helpful in many ways. First, they are fast. They can work with information even (5) __________ than a person. Second, computers can work with a lot of information at the same time. Third, they can store information for a long time. They do not forget things that the common people do. (6) __________, computers are almost always correct. They are not perfect, but they usually do not make mistakes. Recently, it is important (7) __________ about computers. There are a number of things to learn. Many companies have computers at work. In addition, most universities (8) __________ day and night courses in Computer Science. Another way to learn is from a book, or from a friend. After a few hours of practice, you can (9) __________ with computers. NUMBER 8 A. have B. has C. had D. having Question 9. [TH] Choose the correct option A, B, C, or D for each gap to complete the following passage. Computers are helpful in many ways. First, they are fast. They can work with information even (5) __________ than a person. Second, computers can work with a lot of information at the same time. Third, they can store information for a long time. They do not forget things that the common people do. (6) __________, computers are almost always correct. They are not perfect, but they usually do not make mistakes. Recently, it is important (7) __________ about computers. There are a number of things to learn. Many companies have computers at work. In addition, most universities (8) __________ day and night courses in Computer Science. Another way to learn is from a book, or from a friend. After a few hours of practice, you can (9) __________ with computers. NUMBER 9 A. do B. play C. get D. work