X là một loại oxit của Na có khối lượng nguyên tử là 78g/mol và tỉ lệ số nguyên tử Na:o là 1:1.Xác định CTPT của X

Fill in the gaps with the comparative or the superlative form of thr adjectives given 1.Is Ho Chi Minh City.........................Ha Noi?(big) 2.Summer is..................season of the year.(hot) 3.Mount Evrest is......................Mount Fuji.(high) 4.Antarctica is....................place in the world.(cold) 5.Living in the city is......................living in the country(noisy) 6.The population of China is....................that of America. 7.........................desert in the world is Sahara.(hot) 8.Nile river is.....................Mekong ruver(long)

mn giúp mình câu này với giải chi tiết càng tốt ạ,

Giải hộ mik bài 5 nhé mik cảm ơn

( ab x c + d ) x d = 1983 Tìm các chữ số a , b , c , d

Chép hoàn chỉnh đoạn thơ có câu mở đầu: “Nhớ cảnh sơn lâm.." và câu kết thúc lá gai,cỏ sắc.". Nếu cảm nhận của em băng một đến hai đoạn văn vê nghệ thuật và nội dung đoạn thơ

Giúp mình câu 2 và 4 nha .Thank

cho tam giác ABC vuông tại A có góc C=30độ. Tia phân giác góc B cắt BC tại E .Từ E về EH vuông BC (H∈BC). a) tính góc B. b) CM : tam giác ABE=tam giác HBE. c) CM: tam giác EAH cân. d) từ H kẻ HK song song với BE (K∈AC). CM: AE=EK=KC

II. Choose the word whose main stressed syllable is placed differently from that of the other in each group. 1. A. silent B. noisy C. pretty D. polite 2. A. station B. season C. police D. sandal 3. A. agree B. hurry C. enter D. visit 4. A. fasten B. describe C. listen D. hover 5. A. degree B. student C. funny D. widen 6. A. traffic B .dancer C. cycling D. balloon 7. A. central B. gripping C. complete D. boring 8. A. obey B. enter C. answer D. listen 9. A. station B. healthy C. safety D. alone 10. A. tidy B. compete C. extend D. mistake

1. Be quiet or you will not understand the lesson. -> If _______________________________________________________________ 2. Practice speaking English every day or you won’t improve your English. -> If _____________________________________________________________ 3. “ Don’t phone me at night,” she told him -> She told him_______________________________________________________ 4.My friend said to me “ I am unhappy because I don’t have any friends.” -> My friend told me___________________________________________________ 5. She talks so much in class. -> I wish ___________________________________________________________ 6. It’s a shame. My son is so lazy. -> I wish _________________________________________________________ 7. Loan cleans the floor every day. -> The floor_________________________________________________________ 8. The little girl has opened the present excitedly. -> The present________________________________________________________ 9. Mr. Brown last painted the living room two years ago. -> Mr. Brown hasn’t____________________________________________________ 10. She had to wear a coat because it was so cold. -> It_________________________________________________________________ 11.Be hurried or you will miss the train. 🖎If you _______________________________________________________________ 12. “ How do you go to school today, Hoa?” 🖎 Mr Thanh asked________________________________________________________ 13.We got bad grades because the test was hard. 🖎 The test was________________________________________________________ 14. We have to finish the test on time.. 🖎 The test _________________________________________________________ 15. I don’t have enough time to help you. 🖎I wish_________________________________________________________________ 16.I don’t like being so short. 🖎I wish__________ ______________________________________________________ 17. I am excited about the coming festival. 🖎I am looking ___________________________________________________________ 18. Carol finds it easy to make friends. 🖎Carol has no ___________________________________________________________ 19. It’s nearly twenty years since my father last saw my uncle. 🖎My father hasn’t____________________________________________________ 20. The journey to the village was very interesting to the boys. 🖎The boys felt _________________________________________________________