Hai chất hữu cơ X và Y đều có khối lượng phân tử bằng 60. Chất X có khả năng phản ứng với Na, NaOH và Na2CO3. Chất Y phản ứng được với dung dịch NaOH (đun nóng) nhưng không phản ứng với Na. CTCT của X và Y lần A. CH3-COOH, CH3-COO-CH3. B. (CH3)2CH-OH, H-COO-CH3. C. H-COO-CH3, CH3-COOH. D. CH3-COOH H-COO-CH3

A i am HOA. I'm staying(1).................my uncle and aunt. i always school unifom when i am (2).................school. Wearing uniforms encourage me to be proud (3)..................my school . i usually go to school (4)...................monday(5).......................friday. My classes usually finish at 11:15(6) .......................moming so i arrive home(7)....................11:15. i usually have english classes (8)................monday and friday .i am good(9)...................... English. i like listening (10).....................English songs (11)....................my free time. i have leamed English (12)................4 years. in think English will be necessary (13).................my job in the future. 14 Women usually wear the ao dai .....................special occasions. it has never been out ..............fashion. 15. Jean cloth was made .....................cotton.....................the 18th century 16 it is necessary...................students......................wear school unifrom. 17 My home village is...................the north.....................QUY NHON city. 18. i'm looking forward....................hearing from you. 19 nobody can deny the benefits......................the internet in our life. 20. you have read this article......................the website, haven't you? phan2: 1 what did you like when you are a young girl? 2 you should be friendliness to your neighbors. 3 he used to working full time but now he is a pastime worker. 4 if i will see you tomorrow, i will give you a present. 5 the examiner asked me where i live. 6 Nga is very good for learning English.

| x + 1/3 | - 4 = 1 Giúp với ạ Cảm ơn

Exercise 1: Find the word which has a different sound in the part underlined. 1.​A. sugar​​B. such​​​C. spring​​D. similar 2.​A. lucky​​B. country​​​C. lunar​​D. funny 3.​A. flowers​​B. books​​​C. tables​​D. doors 4.​A. peach​​B. children​​​C. machine​​D. chopsticks 5.​A. samba​​B. flag​​​​C. family​​D. marble 6.​A. enjoys​​B. prepares​​​C. attends​​D. reports 7.​A. festival​​B. together​​​C. elephant​​D. telephone 8.​A. Easter​​B. ready​​​C. season​​D. teacher 9.​A. Halloween​B. water​​​C. wedding​​D. week 10.​A. childhood​​B. Christmas​​​C. chocolate​​D. challenge Exercise 2:​Choose the best answer A, B, C or D to complete the sentences. 1.​Do you know what is the _________ is for? ​​A. celebrate​​B. celebrates​​​C. celebration​D. celebrating 2.​The Beatles is my favourite musical band. I love their _________. ​​A. performing​B. performance​​C. performed​​D. perform 3.​Doan Ngo festival is a _________ festival in Vietnam. People celebrate the middle day of summer by eating banh troi and drinking sticky rice wine. ​​A. superstitious​B. religious​​​C. arts​​​D. seasonal 4.​Tet holiday is a chance for all family members to_________. ​​A. gather​​B. gathering​​​C. gathered​​D. gathers 5.​How _________ is this festival held? – It is held every two years.​​. ​A. long​​B. far​​​​C. often​​D. much 6.​In the Ha Long Carnival, there are many people who wear costumes and _________ through the streets. ​​A. eat​​​B. parade​​​C. sing​​D. drink 7.​What is special_________ in Vietnam? – It is buffalo. ​​A. flower​​B. song​​​C. food​​D. animal 8.​How often is Mid-autumn festival held? – It is held _________.​​. ​A. every spring​B. every winter​​C. every year​​D. every two years 9.​Banh Chung, which is made _________ sticky rice, is one of Tet special foods.​​. ​A. from​​B. on​​​​C. in​​​D. for 10.​Rock Storm is a _________ festival. ​A. religious​​B. arts​​ ​​C. superstitious​D. seasonal Exercise 3: Fill in each blank in the sentences with one word. envelopes pray celebratory parades monks performances gifts decorate Festival Thanksgiving 1. ​Christmas is the time for people to give and receive _______________. 2.​ We go to pagoda to ________________ for good luck. 3 .​Children receive their “lucky money” inside red ________________. 4.​We can watch folk music _______________ in Russian Winter Festival. 5.​They _______________ their house with a lot of balloons. 6. We usually have _______________ drinks on special occasions. 7. ​They celebrate the ______________ after harvesting the crop. 8. ​I love flower exhibitions and ______________. 9. ​On ______________, families and friends gather to have a feast. 10. In Hoi Mua Festival, ________________ are invited to preach. (Giúp mk với mk cần gấp)

Rewrite the sentences as directed. 21. The ending of the film was quite moving. (Using "moved") We ____________________________________________________________ 22. We had a habit of swimming everyday before breakfast. (Using "used to") _______________________________________________________________. 23.The teacher explains the lesson in front of the class. (Make a question for the underlined part) ______________________________________________________________ 24. In spite of his hard work, Nam failed his exam. (Using "Though/ Although") _______________________________________________________________ Giusp mình với

câu 1 động vật nguyên sinh có cấu tạo từ A 1 tế bào B 2 tế bào C 3 tế bào câu 2 cấu tạo tế bào cơ thể trùng roi có A 1 nhân B 2 nhân C 3 nhân câu 3 trùng giày di chuyển được là nhờ A nhờ có roi B nhờ có vây C lông bơi phủ khắp cơ thể câu 4 môi trường sống của trùng roi là A ao hồ B biển C sầm ruộng d cơ thể câu 5 cách sinh sản của trùng roi A phân đoi theo chiều doc cơ thể B phân đoi theo chiều ngang cơ thể C tiếp hợp câu 6 tập đoàn của trùng roi là A nhiều tế bào kết lại bào B một cơ thể thống nhất C 1 tế bào câu 7 sự trao đổi khi của trùng roi với môi trường qua bộ phận A màng cơ thể B nhân C điểm mắt D hạt dự trữ câu 8 trùng roi di chuyển bằng cách A xoáy roi vào nước B sâu đo C uốn lượn

Ai giúp em với, em cần gấp cực kì, mong bà con rủ lòng thương xót....😭😭😭

Giúp mk vs mọi người ơi mk sẽ vote ngay 5* nek

Giúp mình nha Cảm ơn rất nhiều luôn ❤️

Giúp mình vói mọi người ơi😘😘😘😘Bài 237 , 238, 239 nha Bài đầu tiên cũng được ạ