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Long Nguyễn Hỏi từ APP VIETJACK

· 15:34 13/09/2021

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văn mâng lữ Hỏi từ APP VIETJACK

Lớp 9 Toán học

· 15:34 13/09/2021

Giải câu √4phần 9

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Linh Lợn Lòi

Lớp 6 Văn học

· 15:32 13/09/2021

tưởng tượng viết đoạn văn (khoảng 5-7 câu)miêu tả cảm xúc của nhân vật cáo khi từ biệt hoàng tử bé(bài đọc hoàng tử bé trích chương XXI) ko chép mạng nha cảm ơn

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Thanh Hằng Hỏi từ APP VIETJACK

Lớp 12 Vật Lý

· 15:31 13/09/2021

Vật dao động điều hòa theo phương trình x = 10cos(4πt+π/8) . Biết li độ của vật tại thời điểm t là 5 cm . Li độ của vật tại thời điểm sau đó 0,25s là bao nhiêu ?

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Bắc Nguyệt

Lớp 8 Toán học

· 15:30 13/09/2021

B10.CMR

a) 3(x^2+y^2+1) lớn hơn hoặc bằng (x+y+1)^2

b) (x^2+y^2)(a^2+b^2) lớn hơn hoặc bằng (ax +by)^2

B11: CMR

x^3+y^3+z^3 - 3xyz = (x+y+z)(x^2+y^2+z^2-xy-yz-zx)

B5: CMR giá trị biểu thức sau ko phụ thuộc vào x

A= (x+3)^2 + (x+5)^2 - 2.(x+3)(x+5)

B6: Cho x,y,z thuộc Z. CMR A chia hết cho 4

Biết A= (x+y)^2 - (x-y)^2

Mọi người giúp mik vs nha

Mik cần gấp.

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Vong Pham Hỏi từ APP VIETJACK

Lớp 6 Văn học

· 15:29 13/09/2021

Tìm đọc toàn bộ tác phẩm "Dế Mèn phiêu lưu kí " và lưu lại những đoạn văn miêu tả mà em thấy ấn tượng để làm tư liệu học tập

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Nguyễn Nhi Hỏi từ APP VIETJACK

Lớp 9 Tiếng anh

· 15:28 13/09/2021

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Triện Đoàn Hỏi từ APP VIETJACK

Lớp 5 Toán học

· 15:32 13/09/2021

Mảnh vườn hcn có chiều dài hơn chiều rộng 32m. Chiều dài bằng 5/3 chiều rộng a) tính chu vi mảnh vườn hcn b) tính diện tích mảnh vườn hcn c) tính chu vi hình vuông biết diện tích hình vuông là 196cm2

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Thanh Hằng Hỏi từ APP VIETJACK

Lớp 12 Vật Lý

· 15:27 13/09/2021

Điểm M dao động điều hòa theo phương trình x = 2,5 cos(10πt) . Vào thời điểm nào thì pha dao động đạt giá trị π/3 , lúc ấy li độ X bằng bao nhiêu ?

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Hà Trang Hỏi từ APP VIETJACK

Lớp 5 Toán học

· 15:26 13/09/2021

Bài 4 trang 16 tiết luyện tập chung toán

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Ngọc Vi Hỏi từ APP VIETJACK

Lớp 9 Toán học

· 15:26 13/09/2021

Khai phương phép chia √9+12a+4a^2/b^2 ( giải chi tiết giúp mik)

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Thị Anh Đào Trần Hỏi từ APP VIETJACK

Lớp 4 Văn học

· 15:26 13/09/2021

Đặt câu với từ QUÊ CHA ĐẤT TỔ,NƠI CHÔN RAU CẮT RỐN

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Trang Trần Hỏi từ APP VIETJACK

Lớp 12 Tiếng anh

· 15:29 13/09/2021

ÔN TẬP VỀ CÁC THÌ TRONG TIẾNG ANH TENSES Choose the best answer Câu 1. I _____ him until he visited my company last week. A. hadn’t seen B. haven’t seen C. didn’t see D. wouldn’t see Câu 2. We ______lunch when the telephone______. A. have just started – rang B. just started – was singing C. had just started – rang D. am having – rings Câu 3. He ___ the army when he ___ 18 A. joins – is B. joined – was C. joined- is D. is joining – has been Câu 4. After you___ your exam, I ___ you out to eat. All right? A. finish/ take B. were finished/ would taken C. have finished/ will take D. finished / had taken Câu 5. “ How many times ___ to the new beauty spot in our neighbourhood?” - “ A few times” A. have you been B. would you be C. were you D. are you Câu 6. In general, by the 2nd year of production, the price of a few products ___ significantly. A. will decreased B. will have decreased C. has decreased D. will be decreased Câu 7. The minibus, which takes people to the other side at the island, ___ at 11 a.m and ___ at 6pm. A. is leaving – is returning B. will leave – will return C. leaves – returns D. is going to leave – is going to return Câu 8. Something tells me that you ___ to a single word I ___ in the past ten minutes . A. haven’t listened / was saying B. haven’t been listening / have said C. didn’t listen/ said D. haven’t listened/ said Câu 9. Up to then, I ___ such a big fire. A. had ever seen B. had never seen C. never seen D. never see Câu 10. While she ___ dinner, her husband ___ after the children. A. cooked – looked B. was cooking – looked C. cooked – was looking D. was cooking – was looking Câu 11. That was the first time Tom ___ to Paris A. was B. has been C. had been D. is Câu 12. The doctor will examine the patient as soon as he ___ here A. will get B. is getting C. got D. gets Câu 13. Helen ___ by the time we arrive. A. will leave B. will have left C. will be leaving D. is leaving Câu 14. The girls ___ to the cinema. They won’t be back until ten o’clock . A. went B. were C. have been D. have gone Câu 15. I ___ all the preparations before you ___ home tonight A. have made/ will have come B. am making/ will come C. will have made/ come D. have made/ will come Câu 16. More and more people ___ up smoking . A. give B. are giving C. have given D. will give Câu 17. This time last Friday, we ___ to Moscow. A. flew B. had flown C. were being flown D. were flying Câu 18. When Bill gets home , his children ___ in the yard . A. will be playing B. will be played C. are playing D. are played Câu 19. He ___ after he ___ ill for a long time A. dies – is B. died – had been C. dies – has been D. died – is Câu 20. It ___ every day so far this week a. has rained B. rained C. rains D. is raining Câu 21. As soon as I will finish my report, I’ll call you and we’ll go out to A B C dinner. D Câu 22. Mark was listening to music after his sister was reading a book. A B C D Câu 23. The composer Verdi has written the opera Aida to celebrate the opening of the Suez Canal, but A B C the opera was not performed until 1871. D Câu 24. When it is raining, I usually go to school by bus. A B C D Câu 25. Ever since I was a child, I had been afraid of dogs. A B C D Câu 26. When I got home, Irene was lying in bed thinking about the wonderful time she’s had. A B C D Câu 27. The professor had already given the homework assignment when he had remembered A B C that Monday was a holiday D Câu 28. I have been hoping to meet you before I read your first novel. A B C D Câu 29. The average adult has got from two to five colds each year. A B C D Câu 30. Shortly before the Allied invasion of Nomandy, Emest Hemingway has gone to London as a A B C war correspondent for Coliers D Câu 31. This is the first time I have lived in a city with a high crime mate A. I am not used to living in a city with a high crime mate B. I am very afraid of living in a city with a high crime mate C. Living in a city with a high crime rate is a dangerous. D. I don’t like to live in such a high crime rate Câu 32. No sooner had Alice registered for the course than she received the scholarship A. Alice registered for the course soon after receiving the scholarship B. Rather than receive the scholarship, Alice registered for the course. C. As soon as Alice registered for the course, she received the scholarship. D. Registering for the course helped Alice received the scholarship. Câu 33. She had only just put the phone down when her boss rang back. A. Hardly she had put the phone down when her boss rang back. B. Hardly did she put the phone down than her boss rang back. C. Hardly she put the phone down when her boss rang back. D. Hardly had she put the phone down when her boss rang back. Câu 34. The rain began to fall during my walk in the country. A. While I walked in the country, it had rained. B. While it was beginning to rain, I had walked in the country C. While I was walking in the country, it began to rain . D. While it began to rain in the country, I was walking. Câu 35. He can’t lend me the book now. He has not finished reading it yet. A. As long as he can’t finish reading the book, he’ll lend it to me. B. He can’t lend me the book until he has finished reading it. C. Having finished reading the book , he can’t lend it to me. D. Not having finished reading the book, he will lend it to me Câu 36. He has never driven such a luxurious car before. A. This car is the most luxurious car he has . B. This is the first time he has driven such a luxurious car C. This is the first time he drives such a luxurious car D. This is the first car he has driven in such a luxurious way Câu 37. We haven’t written to each other for two months . A. It is two months that we wrote to each other . B. It is two months since we wrote together. C. There are two months for us to write to each other. D. It’s two months since we last wrote to each other. Câu 38. When did Mike start learning French ? A. How long has Mike started to learn French? B. How long ago has Mike started to learn French? C. How long has Mike been learning French? D. How long was Mike starting to learn French? Câu 39. The film will end when you finish dinner A. By the time you finish dinner, the film will have ended B. By the time you have finished dinner, the film will end. C. The film will end and then you finish dinner D. By the time the film ends , you will have finished dinner Câu 40. It was a long time ago when I saw a movie A. I spent a long time looking for a movie to see. B. I have seen some movies so far. C. I have seen a number of movies lately D. It is a long time since I saw a movie Câu 41. He used to jog every morning A. He enjoys jogging every morning B. He never fails to jog every morning. C. He doesn’t now jog every morning D. He intended to jog every morning Câu 42. Mr Brown bought this car five years ago. A. Mr Brown started to buy this car five years ago C. Mr Brown has had this car for 5 years. B. It has been five years when Mr Brown bought this car. D. It is five years ago since Mr.Brown Câu 43. Steve left before my arrival A. When I arrived, Steve had already left. B. Steve left as soon as I arrived. C. While Steve was leaving, I arrived D. Steve hadn’t left until I arrived Câu 44. I haven’t met my grandparents for five years A. I often met my grandparents five years ago B. I last met my grandparents five years ago. C. I have met my grandparents for five years D. I didn’t meet my grandparents Câu 45. They finished their tea, then they left . A. After they had finished their tea, they left. B. After they had left , they finished their tea C. They had left before they finished their tea D. They finished their tea after they had left. .

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Khánh Huyền Hỏi từ APP VIETJACK

Lớp 9 Văn học

· 15:28 13/09/2021

Tìm các phép liên kết trong đoạn 1 trang 5 của văn bản “Phong cách Hồ Chí Minh”

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văn mâng lữ Hỏi từ APP VIETJACK

Lớp 9 Toán học

· 15:23 13/09/2021

Giải câu √5

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rfrtfetf

Lớp 7 Toán học

· 15:21 13/09/2021

Hai đường thẳng xx' và yy' cắt nhau tại A, biết $\hat{x A y}$ = 40 $°$ .
a) Tính số đo các góc $\hat{y A x'}, x' A y'$ và $\hat{y' A x}$
b) Vẽ tia phân giác At của $\hat{x A y}$ và tia phân giác At' của $\hat{x' A y'}$ . Chứng minh hai tia At và At' là hai tia đối nhau.

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Anh Nguyen Hỏi từ APP VIETJACK

Lớp 6 Văn học

· 15:21 13/09/2021

Hoàng tử bé phát hiện ra

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Hộ em cái

Lớp 12 Toán học

· 15:21 13/09/2021

NHỜ CÁC CAO NHÂN THỬ SỨC VỚI BÀI NÀY ( ở phần trả lời nhé )

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Nguyễn Thu Phương Hỏi từ APP VIETJACK

Lớp 12 Văn học

· 15:20 13/09/2021

Viết một đoạn văn nghị luận 200 chữ về sống đẹp?

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Phan Thị Ngọc Lan

Lớp 6 Tiếng anh

· 15:17 13/09/2021

2. Read the passage and use the words from the box to fill the gaps. There are TWO words you will NOT need.
rooms desk pictures between posters piano bedrooms

Our family lives in a big apartment in the city centre. There are four (1) ___rooms_______, a living room, a kitchen and two bathrooms. The living room is next
to the kitchen. There is a bookshelf (2) __between________ them. In the living room, we hang many (3) _____picture_____ on the wall. There is also a sofa and a coffee
table.
The most favourite place is my bedroom. I have many (4) _posters_________ on the wall about my favourite music bands. There is also a (5) _____piano_____. I
can play my favourite songs when I am stressed

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Vong Pham Hỏi từ APP VIETJACK

Lớp 6 Văn học

· 15:21 13/09/2021

1.Giả sử em là tác giả của truyện, em hãy viết cái kết khác cho văn bản "Bài học đường đời đầu tiên" 2.Tìm đọc toàn bộ tác phẩm "Dế Mèn phiêu lưu kí" và lưu lại những đoạn văn miêu tả mà em thấy ấn tượng để làm tư liệu học tập 3. Viết đoạn văn nêu cảm nghĩ của em về Dế Mèn.

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Trang nguyen Hỏi từ APP VIETJACK

Lớp 9 Toán học

· 15:17 13/09/2021

Rút gọn bt Căn 4-2√3

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Nhật Minh Hỏi từ APP VIETJACK

Lớp 12 Toán học

· 15:11 13/09/2021

Y= -x^4+4x^2+2 Tìm các điểm cực trị của hàm số

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Linh Lam

Lớp 10 Vật Lý

· 15:11 13/09/2021

Một vật được ném từ mặt đất với vận tốc v0 (vecto) nghiêng một góc alpha với phương ngang. Lấy g = 10 (m/s^2). Chứng tỏ rằng tầm xa đạt được như nhau nếu góc nghiêng là alpha và (pi/2 - alpha)

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Diệu Hương Hỏi từ APP VIETJACK

Lớp 9 Toán học

· 15:08 13/09/2021

Biết sinA = 3/5 tính tỉ số cosa tana cota

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Ngọc Nga Hỏi từ APP VIETJACK

Lớp 9 Hóa học

· 15:08 13/09/2021

Cho 4,5g hh Mg và Al vào H2SO4 loãng dư thu được 5,04lit khí ở đktc và dd A a) Tính thành phần % kluong mỗi chất trong hh ban đầu b) dd A thu đc hòa tan Zn dư thu đc 3,36lit khí đktc. Tính kluong H2SO4 5% đã lấy ban đầu để hòa tan hh KLoai