Một ống mao quản hở cả hai đầu bán kính $1mm$ được đổ đầy nước và dựng đứng. Hãy xác định độ cao của cột nước còn lại trong ống mao quản. Bỏ qua độ dày của thành ống. Cho biết $\sigma_{n} = 72,5.10^{3}N/m$

Các lệnh sau lệnh nào hợp lệ nếu không hợp lệ hãy sửa lại a. For i:=100 to 1 do write('A') b. For i:=1,5 to 5 do write('A') c. x:=10; while x:=10; do x:=x+5 Trả lời giúp mik vs mik cần gấp ai trả được thì mik cho 1 câu trả lời hay nhất và cho 5 sao.

MỌI người ơi, giúp mk bài 5 này với ạ!!!!!

Hung is my best firend.He works in a big company -->

ĐỀ SỐ 8 I. Choose the word or phrase that best completes each of the following sentences(2ms) 1. Would you mind…………………..in the front seat of the taxi? A. to sit B. sitting C. sits D.sat 2. A contest in which people have to fetch water from the river is called a……………..contest. A. water-fetching B.water - fetch C. fetching - water D. fetch - water 3. The Pyramid of Cheops is one of the seven………………….in the world. A. temples B.pogoda C. churches D. wonders 4. When the phone rang , I ........................... A. sleep B. sleeping C. was sleeping D. slept 5. I asked him ....................... he liked coffee . A. what B. which C. when D. whether 6. I don’t know how..……………. the game. A. play B. to play C. playing D. played 7. The boy................next to Hoa is a new comer. A. sit B. to sit C. sitting D. sits 8. Thanks………………….inviting me to the festival. A.for B. in C. of D. at II. Supply the correct form of the verbs in parentheses (1m) 1. I ( watch)……………………….TV when the phone rang. 2. I tried ( solve)…………………….......the problem but I couldn’t. 3. She asked me if I( want )………………………….to have a drink. 4. We (learn )......................…………….... English for 3 years. III. Read the text then complete the passage:(1,5ms) in , play , was , game , it , clue Hoa and Nga were bored , so Nga suggested playing a (1)...................called 20 Questions. Nga explained the rules and then the girls started to (2).................. Nga thought of a place and she gave Nhi a (3).................by saying that it wasn’t (4)................VietNam . Nhi found out the place (5)..............in America and she said(6) …….......was the Statue of Liberty . IV. Read the following passage then answer the questions.(1m) I have just received a letter from my elder brother Nam. He is in Australia now. He has been there for six months. My brother is an engineer. He has already visited many places in Australia. He has just bought a car and has gone to Alice Springs, a small town in the center of Australia. He has never been abroad before, so he is finding this trip very exciting. 1. What does Nam do? ………………………………………………………………………………………………. 2. How long has he been in Australia? ………………………………………………………………………………………………. 3. Has he already visited many places in Australia? ………………………………………………………………………………………………. 4. Why is he finding the trip exciting? ………………………………………………………………………………………………. V. Rewrite the sentences with cue words given(1m) 1. He said “I am a teacher”. =>He said……………………………………………………………………………………… 2. “Do you like to visit Da Lat?”Nhi asked Nga . => Nhi asked Nga …………………………………………………………………………….. 3. Ba bought this book last year. => This book ………………………………………………………………………………….. 4. It’s a contest in which people have to cook rice. =>It’s a………………………………………………………………………………………… VI. Use the cue words below to write a complete postcard .(1.5ms) Dear Hoa, I / having / a wonderful time / Da Lat. ………………………………………………………………………………………………… The weather / cold / windy. ………………………………………………………………………………………………… The people/ this city / friendly and helpful. ………………………………………………………………………………………………… Yesterday I / visit / friend, Lan and her family. It / happy / see them. ………………………………………………………………………………………………… Tomorrow I / go to the market to buy /souvenirs for you and my family members. ………………………………………………………………………………………………… See you soon. Love, Huong.

Giải hộ em từ câu 1 đên câu 10 vs ạ

cho hình lập phương ABCD.A'B'C'D' cạnh a. Tính độ dài đường chéo AC' của hình lập phương

mk đang cần gấp ạ. giải các phương trình sau: a, 3(x-2)= 7(10-4x) b, 2x^3 + 5x^2 + 3x=0 c, (x+3)(2x-1)= 4(x+3) d, x(x-2) -3x+6=0

hãy viết một bài văn chứng minh rằng bảo vệ môi trường thiên nhiên là bảo vệ chúng ta

ĐỀ SỐ 7 I. Chọn từ có phần bị gạch chân, phần trọng âm phát âm khác với những từ còn lại 1. a. compile b. connect c. wonder d. concern 2. a. cleaned b. mixed c. removed d. drained 3. a. compile b. heritage c. jungle d. ranger 4. a. wonder b. connect c. compile d. requirement II. Chọn đáp án thích hợp trong số a, b, c, d để hoàn tất câu 5. Our teacher asked us ……… we liked to go camping in the coming festival. a. whether b. if c what d. a & b 6. It’s too cold outside. Would you mind ……… the window? a. to close b. close c. closed d. closing 7. The festival was held in the communal house yard. a. organized b. started c. designed d. met 8. Nam writes very quickly. He has………finished his essay. a. already b. for c. yet d. since 9. It is exciting………….. the play many times.It’s really a good one a. to watch b. watching c. watch d. watched 10. Do you mind if he …….. me to carry this bag? a. help b. to help c. helps d. helped 11. She ................the letter yet. a. has finished b. haven’t finished c. have finished d. hasn’t finished 12. Has the flight ……… Hong Kong departed yet?. a. with b. of c. from d. to 13. My family ………dinner when the phone rang. a. are having b. had c. have had. d. were having 14. Would you mind if I …….. the door? a. opened b. opens c. opening d. to open 15. He said he is a plumber and he could fix the faucets. a b c d 16. The freshmen have to gather at universities in early October. a. first- year students b. teachers c. workers d. engineers 17. An ........contest will be hold at Ngo Gia Tu School next month. a. English-speaking b. English-spoken c. speaking-English d. speak-English 18. It was late, so we decided……… a taxi home. a. take b. to take c. taking d. took 19. There are people who are skeptical……..this new method of education. a. of b. at c. in d. about 20. It was so exciting to see those ……….. caves. a. magnificence b. magnificent c. magnificently d. magnificentness III. Đọc đoạn văn và đánh dấu đúng(T)hoặc sai(F)cho những tình huống sau. Ha Long Bay is popular with both Vietnamese and international tourists. One of the attractions of Ha Long is the Bay’s calm water with limestone mountains. The Bay’s water is clear during the spring and early summer. Upon arriving in Ha Long City, visitors can go along Chay Beach. From the beach, they can hire a boat and go out to the Bay. It is here that the visitors can find some of Southeast Asia’s most beautiful sites. Dau Go Cave is one of the most beautiful caves at Ha Long. .........21. Ha Long Bay is popular with only Vietnamese. .........22. There aren’t any limestone mountains in Ha Long Bay. .........23. Chay Beach is in Ha Long Bay. .........24. One of the most beautiful caves at Ha Long is Dau Go Cave. IV. Viết lại câu nghĩa không đổi. (1điểm) 1. “Is Mount Everest 8,848 meters high?” . Lien asked me……………………………………………………… 2. My brother painted the gate last year. The gate……………………………………… 3. Nam does exercise every morning. He wants to keep fit and stay healthy. ………………………………….in order to…………………………… 4. We took part in a contest in which participants have to fetch water We .........................................................a..........................................contest V. Dùng từ gợi ý, để viết thành lời hướng dẩn về cách sử dụng máy in ( Lưu ý sử dụng các từ nối theo trật tự thời gian: first, then, next, after this, finally ).(2điểm ) Ex : -First, plug in the printer and turn on the power. 5. Wait/ power button / flash. …………………………………………………………... 6. Have/ pages/ appear/ computer screen. …………………………………………………………… 7. Click/ printer icon/ the screen/ wait/ a few/ seconds. …………………………………………………………… 8. Printed paper/ come out/ the output path/ a minute …………………………………………………………… VI. Đọc đoạn văn sau và trả lời câu hỏi:(1điểm) My name’s Trang. I’m a student, a university student. I’m eighteen years old. I’m studying English. English is very important to me because I will need it for my job in the future. I began learning English when I was very young- at the age of eight. I think that my problem is listening. People speak very quickly, so I can’t understand them. English is really hard for me to learn, but I like it 9. Why is English important to Trang? …………………………………………………………….. 10. What is her difficulty when she studies English? ……………………………………………………………..