Rút gọn biểu thức: B=(2(x-2√x+1)/x-4-2√x-1/√x+2):√x/√x-2 (với x>0,x≠1)

em hiểu thế nào về nhan đề Buổi Học Cuối Cùng AI giúp mình với mình hứa sẽ cho 5* CTLHN và cảm ơn ạ

Một kính lúp có tiêu cự f (đo bằng cm). Số bội giác của kính lúp được tính bằng công thức; A: G = 1/25f B: G = 25/f C: G = 25f D: G = f/25

Viết một đoạn văn ngắn (khoảng 6 đến 8 câu), nêu cảm nhận của em về một nhân vật mà em thích trong văn bản “Buổi học cuối cùng” của A.Đô-đê.

Khoảng từ 50 đến 70 học sinh tham gia lao động trồng cỏ sân trường . Tính số học sinh đó biết rằng nếu xếp thành các nhóm đều nhau : mỗi nhóm 4 học sinh ; 5 học sinh ; 6 học sinh thì thừa 3 học sinh

Choose the best answer A, B, C or D to complete the sentence. Question 10. Look at your weekly schedule! Your presentation on visual pollution _________at 8.00. Don’t be late please. A: to start B: starts C: start D: is starting 23 Choose the correct sentence made from the given words. Question 25. English/official language/countries/like/India,/Malaysia,/Singapore/. A: English is a official language in countries like India, Malaysia and Singapore. B: English is official language in countries like India, Malaysia and Singapore. C: English is an official language in countries like as India, Malaysia and Singapore. D: English is an official language in countries like India, Malaysia and Singapore. 24 Choose the word whose underlined part is pronounced differently from the others. A: stayed B: arrived C: listened D: looked 25 Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions. THE HOPI OF ARIZONA The Hopi live in the northwestern part of Arizona in the United States. With modern things all around them, the Hopi keep their traditions. There are about ten thousand Hopi and they live in twelve villages in the desert. The weather is very hot in the summer, but in winter it freezes. The wind blows hard. Farming is difficult. Corn is the Hopi’s main food, but they plant vegetables, too. They raise sheep, goats, and cattle. They also eat hamburgers, ice cream and drink soft drinks. They live in traditional stone houses, but many of them have telephones, radios, and television. They have horses, but they have trucks too. Kachinas are an important part of the Hopi religion. Kachinas are spirits of dead people, of rocks, plants, and animals, and of the stars. Men dress as kachinas and do religious dances. People also make wooden kachinas. No two wooden kachinas are ever alike. The children attend school, and they also learn the Hopi language, dances and stories. The Hopi want a comfortable, modern life, but they don’t want to lose their traditions. Question 19. The main Hopi food is _______________. A: corn B: vegetables C: hamburger D: beef

Giúp mình với ạ! Mai mình nộp rồi

Choose the best answer A, B, C or D to complete the sentence. Question 10. Look at your weekly schedule! Your presentation on visual pollution _________at 8.00. Don’t be late please. A: to start B: starts C: start D: is starting 23 Choose the correct sentence made from the given words. Question 25. English/official language/countries/like/India,/Malaysia,/Singapore/. A: English is a official language in countries like India, Malaysia and Singapore. B: English is official language in countries like India, Malaysia and Singapore. C: English is an official language in countries like as India, Malaysia and Singapore. D: English is an official language in countries like India, Malaysia and Singapore. 24 Choose the word whose underlined part is pronounced differently from the others. A: stayed B: arrived C: listened D: looked 25 Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions. THE HOPI OF ARIZONA The Hopi live in the northwestern part of Arizona in the United States. With modern things all around them, the Hopi keep their traditions. There are about ten thousand Hopi and they live in twelve villages in the desert. The weather is very hot in the summer, but in winter it freezes. The wind blows hard. Farming is difficult. Corn is the Hopi’s main food, but they plant vegetables, too. They raise sheep, goats, and cattle. They also eat hamburgers, ice cream and drink soft drinks. They live in traditional stone houses, but many of them have telephones, radios, and television. They have horses, but they have trucks too. Kachinas are an important part of the Hopi religion. Kachinas are spirits of dead people, of rocks, plants, and animals, and of the stars. Men dress as kachinas and do religious dances. People also make wooden kachinas. No two wooden kachinas are ever alike. The children attend school, and they also learn the Hopi language, dances and stories. The Hopi want a comfortable, modern life, but they don’t want to lose their traditions. Question 19. The main Hopi food is _______________. A: corn B: vegetables C: hamburger D: beef

18. Hoàn thành các phương trình hóa học sau và cho biết phản ứng nào là phản ứng hóa hợp ? vì sao ? a) Mg + ? MgS b) ? + O2 Al2O3 c) ? + Cl2 CuCl2 d) Fe2O3 + H2 Fe + H2O 19 Một oxit của lưu huỳnh trong đó oxi chiếm 60% về khối lượng. Tìm CT của oxit đó. 20. Xác định CTHH của nhôm oxit biết tỷ lệ khối lượng của 2 ngto Al và O là 4,5: 4. 21. Oxit của 1 ngto có hóa trị II chứa 20% oxi về khối lượng, timg CTHH của oxit đó.

Hãy chuyển số thập phân sau sang phân số rồi rút gọn: 4,136 = ../.. = ../..