Một xe ôtô đi từ A đến B với vận tốc 80 km/h, cùng lúc đó một xe máy đi từ B đến A với vận tốc 50 km/h. Hỏi sau bao lâu thì hai xe gặp nhau ? Biết quãng đường AB là 325 km.

chỉ ra câu nêu ý khái quát của đoạn trích Tự Học Một Nhu Cầu Thời Đại

có 2 rổ cam . rổ thứ nhất có 9 quả cam . rổ thứ hai nếu thêm 3 quả thì sẽ gấp đôi rổ thứ nhất . hỏi cả hai rổ có bao nhiêu quả cam

1,mận có trồng bằng cách chiết cành không ? 2,Hình thức nào là sinh sản sinh dưỡng do người? A. Cây mới được tạo thành từ một đoạn thân, đoạn cành cắm xuốmg đất ẩm B. Cây mới được tạo ra từ chồi của cây này ghép lên một cây khác C. Cây mới tự mọc lên từ thân bò, thân củ, rễ củ hoặc lá D. Cây mới tự mọc lên từ thân bò.

IV. Fill in the blanks Dear Lan, I’m ……………………..(0) to invite you to a party we ………………….(1) at the flat next Friday , December 14th . As you know, …………………….Lien’s 13th birthday next week and my birthday next month, ……………………..(3) we thought we’d celebrate together and have a joint party. I can’t remember if you know my address or not, but anyway, if you ………………… (4) the directions below, you shouldn’t get lost. Take the Number 15 bus from the station and ……………….(5) at the Star Hotel. Walk down Long Viet Road, past the Dan Chu Cinema, and then …………………… (6) the first turning on the right. That’s Le Loi Road. Turn left ………………..(7) the first junction, then go straight past the church as far as the next crossroads . …………………(8) and our block of flats is the second on the right. Do try and come. Of course you’re ………………….(9) to bring someone with you if you want to. Look forward ………………….(10) you then! Love, Mai 0. A. writing B. write C. writes D. to write 1 A. have B. are having C. going to have D. will has 2 A. it’s B. its C. they’re D. she’s 3 A. too B. but C. because D. so 4 A. to follow B. follow C. following D. follows 5 A. get up B. get by C. get on D. get off 6 A. have B. get C. take D. bring 7 A. in B. at C. of D. on 8 A. Right turn B. To right C. To turn D. Turn right 9 A. welcomed B. welcome C. welcoming D. to welcome 10 A. to see B. for seeing C. of seeing D. to seeing V.Write the correct form of the verb in brackets 1.. Jonh (watch)____________TV when his friend (ring)____________him up last night. 2. You (be)______________________able to speak English better if you (learn)______________________harder. 3.How much time do you spend (watch)______________________TV every day ? 4. Nam (not visit)___________the museum with his class last Sunday because he (catch)___________a cold. 5. Boys like (play)___________marbles or catch while girls enjoy (skip) ___________rope or chatting. 6.Keep silent. please.Our teacher (explain)_______________________the lesson. VI.Fill in the blank with one suitable preposition 1.In a game of singles, two players play_________ each other. 2.I’m not very fond _________ detective stories. 3.Margarine is different _________ butter. 4.His parents are very strict_________ him. 5.Many people take pan_________ riding a bike. 6.We’d like a walk instead _________ jogging every morning. 7.Huy is very good_________ fixing tilings. 8.They study and listen to music _________ the same time. 9. _________ literature, we learn about books and write essays. 10.Will you be home_________ dinner tonight ?

Giúp em câu 1 nhanh ạ ( nếu đc thì giải thích giùm em )

Exercises 2: Choose the best answer a, b, c or d? 2. ___ is your blood type? a. which         b. who                        c. what            d. how 3. ___ do you play tennis? For exercise. a. which         b. who                        c. what            d. how 4. ___ can I buy some milk? At the supermarket. a. which         b. who                        c. where         d. how 5. ___ much do you weigh? a. which         b. who                        c. what            d. how 6. ___ hat is this? It's my brother's. a. which         b. who            se        c. what            d. how 7. ___ can I park my car? Over there. a. where         b. who                        c. what            d. how 8. ___ tall are you? a. which         b. who                        c. what            d. how 9. ___ do you expect me to do? a. which         b. who                        c. what            d. how 10. ___ do you like your tea? I like it with cream and sugar. a. which         b. who                        c. what            d. how 11. ___ picture do you prefer, this one or that one? a. which         b. who                        c. what            d. how 12. ___ is that woman?  - I think she is a teacher. a. which         b. who                        c. when           d. how 13. ___ book is this? It's mine. a. which         b. who                        c. whose         d. how 14. ___ do you usually eat lunch? At noon. a. which         b. when          c. what            d. how 15. ___ you wash clothes every week? a. which         b. who                        c. what            d. how 16. ___ does your father work? At City Hall. a. where         b. who                        c. what            d. how 17. ___ usually gets up the earliest in your family? a. which         b. who                        c. what            d. how 18. ___ do you think of this hotel? It's pretty good. a. which         b. why                        c. what            d. how 19. ___ does your father work at that company? Because it's near our house. III. Read the passage then answer the questions. Bobbi Brown is a very busy man. He is 60 years old and he has thirteen jobs. He is a postman, a policeman, a fireman, a taxi driver, a school-bus driver, a boatman, an ambulance man, an accountant, a petrol attendant, a barman, and an undertaker. Also, he and his wife, Magaret, have a shop and a small hotel. Bobbi lives and works on the island of Gigha in the west of Scotland. Only 120 people live on Gigha but in summer 150 tourists come by boat every day. Every weekday Bobbi gets up at 6.00 and makes breakfast for the hotel guests. At 8.00 he drives the island’s children to school. At 9.00 he collects the post from the boat and delivers it to all the house on the island. He also delivers the beer to the island’s only pub. Then he helps Magaret in the shop. He says: “Magaret likes being busy, too. We never have holidays and we don’t like watching televison. In the evenings Magaret makes supper and I do the accounts. At 10.00 we have a glass of wine and then we got to bed. Perhaps our life isn’t very exciting, but we like it.” 1. Where does Bobbi live? .......................................................................................................................................... 2. How old is he? .......................................................................................................................................... 3. How many jobs does he have? .......................................................................................................................................... 4. What is his wife’s name? .......................................................................................................................................... 5. How many people live on Gigha? .......................................................................................................................................... 6. How do visitors come to Gigha? .......................................................................................................................................... 7. What does Bobbi do at 8 o’clock? .......................................................................................................................................... 8. How many pubs are there on the island? .......................................................................................................................................... 9. Do Bobbi family usually have holidays? .......................................................................................................................................... 10. What does Bobbi’s wife do in the evening? ..........................................................................................................................................

Giúp mình với ạ mình cần giúp đỡ

1.17-[-42:(-6)-(21-33)+72:(-18) 2.(-2)+[49-(-3)mũ 2]:(-5)+35 3.(68+x)-2(x-1)=12 Đề bài 1.2:tính hợp lí nếu có thể Bài 3 tìm x

Đốt cháy 8,9g hõn hợp Mg và Zn ta thu được 12,1g oxit a, Tính % khối lượng các kim loại trong hỗn hợp đầu b. Cần bao nhiêu ml dung dịch HCL 14,6% có D=1,12g/ml để hòa tan hết lượng oxit trên