Tìm ba phân số biết tổng của chúng = 1/70 tử số của chúng tỉ lệ với 3 :4 : 5 và các mẫu số tương ứng với tỉ lệ 5 : 1 : 2

Hợp chất Ba(NO3)y có phân tử khối là 261 biết Bari có nguyên tử khối là 137 và hóa trị II tính hoa trị của nhóm NO3

Daisy the cow Last July, Lucy was staying at her aunt and uncle’s farm in the countryside. On the farm they had a lot of black and white cows. Lucy’s favourite cow was called Daisy. She liked her because she had pretty brown eyes. Every morning, Lucy’s uncle took the cows from the farm to the fields. One day, Lucy decided to help her uncle. They took the cows into the field. She was picking flowers when suddenly she saw the cows running out of the field. “Help, I can’t stop them!” she shouted. Her uncle and his dog caught all the other cows, but they couldn’t find Daisy. No one knew where she was. Lucy felt horrible. 1. What did Lucy like about Daisy the cow? => 2. Where did Lucy’s uncle take the cows? => ................................................................................................................................. 3. What was Lucy doing when the cows ran out of the field? => ................................................................................................................................. 4. Who helped Lucy’s uncle to catch the cows? => ................................................................................................................................. 5. Why did Lucy feel horrible? => .................................................................................................................................

hỗn hơp A gồm SO2,O2 có tỷ khối đv CH4 =3 a) xác định % về thể tích mỗi khí trong hỗn hợp A b) cho hỗn hợp B đi qua bình thép có xúc tác là V2O5 thu được hh khí B biết H% của nó là 8%.Xác định % của mỗi khí trong hh B

Ai làm đc câu nào chỉ dùm mình câu đó với ạ mình đánh giá 5 sao luôn ạ. Cảm ơn luôn ạ D. SOME, ANY, MUCH, MANY, A LOT OF, A LITTLE, A FEW & ARTICLES I. Write complete sentences with the given words. 1. I / be / student / Ly Thuong Kiet primary school. 2. There / cat / under / bed. 3. Against / parents’ / wishes / she / want / be / journalist. 4. I/ tired / take / buses. / Let’s / buy / car. 5. Watch/ American / movies / be / way / improve / your / listening skill. 6. She / going / holiday / with / friends / next August. 7. furniture / arrive / you / this morning. 8. He / only / want / a / food / he / not / hungry. 9. There / be / few / large / house / in / village, / the / rest / cottages. 10. He / used / play / football / a / friends. 11. Have / got / money / your / bag? 12. It / not / take / me / time / get / used / live / the / city. 13. He / advise / me / not / spend / lot / time / chat / Facebook. 14. I / suggest / travel / motorbike / as / you / see / lot / beautiful / sceneries / along / street. 15. We / only / move / here / few / day / ago. II. Rewrite the following sentences, beginning with the given words. 1. He didn’t invite many people to his birthday party. He only ...................................................... 2. I only spoke to a few people at the party. I didn’t .................................................................................. 3. There was a little rain last night. There wasn’t ........................................................................... 4. I have no word for this problem. I don’t ..................................................................................... 5. I only carry a little money in my bag. I don’t .......................................................................................... 6. He doesn’t want much food because he is not hungry. He only ............................................................. 7. There are a few trees in the garden. There aren’t ................................................................................... 8. It didn’t take me much time to get used to living in the city. It took ...................................................... 9. Tom drives better than Tony. Tom is ...................................................................................................... 10. Mary doesn’t cook as well as Laura. Laura is ........................................................................................ 11. She studies far more seriously than she used to do. She is ...................................................................... 12. Peter doesn’t have many friends in this city. Peter has .......................................................................... 13. My father swims better than my mother. My father is ............................................................................ 14. There aren’t many people in the hall. There are ..................................................................................... 15. He doesn’t spend much time doing morning exercises. He spends ........................................................

Một xe ô tô chuyển động trên đoạn đường thẳng: 1/3 quãng đường đầu chuyển động với vận tốc v1 = 60 km/h, quãng đường tiếp theo chuyển động với vận tốc bằng vận tốc trung bình trên cả quãng đường, quãng đường còn lại chuyển động với vận tốc v3 = 15 km/h và hết 1/3 tổng thời gian. Tính vận tốc trung bình của ô tô trên cả quãng đường. Đăng lại coi có ai giải đc ko

MN ơi giúp em làm đc câu nào thì làm Em đăng 2 lần r đó ạ Giải phương trình nghiệm nguyên a) $x^{2}$ + x - $y^{2}$ - 9 = 0 b )$x^{2}$ + xy - y = 2 c ) $2x^{2}$ + xy + 3y = 3 d) $\frac{3}{x}$ + $\frac{3}{y}$ = 5

A=3 phần căn x +1 - (x lớn hơn 0) B=căn x +16 phần căn x + 5 -(x lớn hơn hoặc = 0) C=2 căn x +19 phần căn x +3 -(x lớn hơn hoặc = 0)

Pronunciation giúp !!!!!!!!!!!!!!!!!!!!!!!

1. We help him every year. =>He 2. She plays badminton in Hoang Hoa very often. => Badminton 3. They usually carve wood in the evening. => Wood 4. Mr. Mathew surfs the Webs on Sunday. => The Webs 5. These boys ride horses every Sunday.(ridden) => Horses 6. They do gymnastics every weekend to keep fit and stay healthy.(done) => Gymnastics 7.Mary has collects bottles every two weeks => Bottles 8. Bat Trang usually makes pottery.(made) => Pottery is usually 9. My parents make models for us in the evening. => Models are 10.David eats a lot of junk food.(eaten) => A lot 11. Hung washes the dishes before meals. => The dishes 12.My sister plays computer games at night. => Computer games 13.We often wear bandage before the games.(worn) => Bandage 14.Watching too much TV hurts your eyes.(hurt) =>Your eyes 15. We fire lots of calories and energy today. => A lot of calories and 16.We help homeles people very often. => Homeless people 17. Disabled people need our help. => Our help 18. He does exercise to keep fit. => Exercise 19. I do not play computer games. => Computer games 20. Elderly people do not eat junk food. => Junk food 21. They show too many advertisements on TV every days.(showed/shown) => Too many 22. They do not clean the beaches very often. => Beaches 23. We don’t look down the poor. => The poor 24. She visits Hue every year. Hue 25. They farm rice here yearly. Rice 26. Mary také a lot of mistakes each semester.(taken) A lot of 27. We donate blood dủing school year. Blood 28. He draws a mural on the wall in June.(drawn) A 29. We do not provide money for them . Money 30. People make lots of musical instrument . Lots 31. Do you show your projects every week? Are