Viết một đoạn văn 10 câu để làm rõ tình yêu thiên nhiên của Bác trong bài cảnh khuya(bài thơ phải sử dụng câu đặc biệt) Nhanh nha mik cần gấp

Câu 1 : trên một bóng điện có ghi 220v-60w và một ấm điện có ghi 220v-800w cùng mắc vào hiệu điện thế 220v. a) mắc 2 thiết bị điện như thế nào để chúng hoạt động bình thường ? vì sao ? tính điện trở tương đương của mạch điện b) dùng ấm điện để đun 2kg nước ở 20 độ C, sau thời gian 20 phút thì nước sôi (100 độ C ). Tính hiệu suất của ấm điện, biết nhiệu dung riêng của nước là 4200J/kg.K c) nếu đun nước trong thời gian 15 phút mà nước sôi với các điều kiện như trên thì khối lượng nước trong ấm là bao nhiêu ?

Xét theo mục đích nói câu "Nghĩ lại đến giờ sống mũi còn cay" thuộc kiểu câu nào và thực hiện hành động nói gì?

Bài 1 (5 điểm): Cho tam giác đều ABC có AH vuông góc với BC tại H a) Chứng minh ∆AHB =∆AHC và tính ; b) Đường thẳng vuông góc với AB tại A cắt đường thẳng BC tại D. Trên cạnh AD lấy S sao cho AS=AH. Chứng minh ∆AHC =∆ASC ; c) Chứng minh S là trung điểm của AD. Bài 2 (5 điểm): Cho cân tại A có . Vẽ AH vuông góc với BC tại H. a. Chứng minh ; b. Trên nửa mặt phẳng bờ BC không chứa A, vẽ tia sao cho . Tia cắt đường thẳng AH tại . Tính ; c. Trên cạnh lấy điểm sao cho và cắt tại . Chứng minh DE vuông góc với AB

Nêu nội dung cơ bản của thuyết động học phân tử chất khí

tương tự như đối vs đẳng thức , đối vs bất đẳng thức ta cũng có tính chất sau : Nếu a > b thì a + c >b + c Nếu a + c > b + c thì a > b Áp dụng tính chất trên. Hãy chứng tỏ rằng vs x,y thuộc Z, ta có a) Nếu x > b thì x - y > 0 b) Nếu x - y > 0 thì X > y

Các máy cơ đơn giản A: luôn bị thiệt về đường đi B: chỉ có lợi về lực. C: không cho lợi về công D: lợi cả về lực và đường đi

Bài 4: Cho tam giác ABC vuông cân tại A. Các điểm D, E theo thứ tự di chuyển trên AB, AC sao cho BD = AE. Xác địnhvị trí điểm D, E sao cho: a/ DE có độ dài nhỏ nhất b/ Tứ giác BDEC có diện tích nhỏ nhất. Giải câu b thôi nhờ mn giúp

(1)_________the United States, many adults and children (2)_________overweight. Some people eat (3)_________food at meals. They also eat snacks between meals. Sometimes people eat healthy snacks like fruit or vegetables (4)_________many Americans eat a lot of junk food such as cookies, candy and potato chips. Eating junk food can (5)_________people gain weight. People also gain weight (6)_________they don’t get enough (7)_________. People need to walk, run, ride bicycles, or walk out in health clubs and gyms .When people exercise, they (8)_________good and have more energy. A good (9)_________ and exercise will help you (10)_________ a long and healthy life. 1. A. On B. In C. At D. from 2. A. is B. was C. were D. are 3. A. too many B. too much C. few D. plenty 4. A. but B. because C. although D. so that 5. A. get B. lead C. urge D. make 6. A. so B. however C. but D. because 7. A. exercises B. work C. exercise D. energy 8. A. become B. taste C. have D. feel 9. A. diet B. meal C. food D. health 10. A. to live B. living C. live D. to living 2. Read the passage and choose the best answer to the following questions. Bangkok, the capital of Thailand, is a city of contrasts. It is an exciting, crowded, modern city and, at the same time, a city that is full of history. The streets of Bangkok are usually noisy and have too many people. Some people are selling food; others are selling clothing, cassette tapes, flowers, or souvenirs. Visitors love the river markets, the beautiful temples and architecture, and the nightlife. Most of the year, Bangkok is hotter than any other capital city in Asia, but from December to February, the weather is not as warm and so it is much more comfortable. Actually, it’s an interesting city to visit at any time of the year. The shopping is excellent, and the prices are not as high as in many other large cities in Southeast Asia. There is always so much to do in Bangkok at anytime of the day or night – from watching Thai dancing or boxing to taking a boat trip on the river or trying some of the delicious and spicy food. And if you get tired of the city and want a quiet place, there are beautiful beaches only two hours away by bus. 1. Which phrases can you use to describe the streets of Bangkok? A. a city of contrasts B. noisy and crowded C. full of history D. excited and modern 2. What does NOT interest visitors in Bangkok? A. the shopping B. sightseeing C. the weather D. the nightlife 3. “so much to do in Bangkok” means ____. A. easy to find a job in Bangkok B. much free time C. lot of entertainment D. lot of souvenirs 4. What visitors cannot see or watch at any time of the day? A. Thai dancing B. Thai boxing C. river markets D. nightlife 5. Where is the nearest beach from Bangkok? A. only two hours B. only two hours away C. only two hours from Bangkok D. only two hours away by bus 3. Read the paragraph and fill in the gap with one suitable word: All the world knows William Shakespeare as one of the greatest poets and dramatists. He was (1).................in a small English town of Stratford-upon-Avon and (2) ..............up in a large family of eight brothers and four sisters, but many of them died very (3) ................ His father, John Shakespeare, made and sold gloves. William learned (4).....................a school in Stratford. He married very young (5)......................he was about nineteen, and soon (6).............. to London where he worked at a theater. There he began to write (7)................for the theater, his plays were good and people like (8)..................... Now Shakespeare could help his family in Stratford. He (9)........................thirty-seven plays and some books of poems. At the end of his life he came back to Stratford and (10).....................................there. C. WRITING 1. Rewrite each of the following sentences using the CAPITAL word given (do not change the capital words given). 1. They are cutting the cake with a sharp knife. (CUT) ………………………………………………………………………….. 2. I spend half an hour each day doing my homework. (TAKES) ………………………………………………………………………….. 3. Because of the bad weather, we had to stop our picnic. (FROM) ………………………………………………………………………….. 4. My mother cooks well. (A) ………………………………………………………………………….. 5. How far is it from Hanoi to Ho Chi Minh city? (DISTANCE) …………………………………………………………………………..

1. Choose the best answer to complete the following sentences 1. A: “Those girls are very good at dancing!” - B: “ ___________” A. So do I! B. I know, they are C. Yes, they do! D. They were fine, thanks 2. I occasionally miss the bus so I have to take a taxi instead. A. never B. always C. sometimes D. rarely 3. There isn’t __________ for dinner, so I have to go to the market. A. any left B. some left C. any leaning D. some leaving 4. Public ___________ in this city is quite good, and it’s not expensive. A. journey B.travel C. vehicle D. transport 5. Bicycles ___________ in the driveway. A. must not leave B. must not be leaving C. must not be left D. must not have left 6. The film was so __________. However, my father saw it from beginning to end. A. interesting B. exciting C. boring D. fascinating 7. If the weather _____________ good, I _____________ camping with classmates. A. is / go B. is / will go C. will be / go D. will be / will go 8. Find the word which has a different sound in the part underlined. A. birthday B. mouthful C. breathe D. worth 9. Rob eats a lot of fast food and he __________ on a lot of weight. A. takes B. spends C. puts D. brings 10.You are not allowed to smoke in this hall. A. forbidden B. asked C. let D. made 11. “They listen to the music with great interest” means_____________ A. They enjoy the music. B. They hate the music. C. They dislike the music . D. They never listen to that music. 12. If people turn off all electric appliances in one hour all over the world, they can save lots of ______. A. electric B. electrical C. electrician D. electricity 13. These three Rs __________ reduce, reuse and recycle. A. stand up B. stand for C. ask for D. means 14. He _________ English in this school since he _____________ here. A. has taught/moved B. taught/moved C. taught/ has moved D. has taught/has moved 15. Find the word whose main stress pattern is different from others. A. beautiful B. interesting C. environment D. difference 2. Find a mistake in each sentence and correct it. 1. She asked us learned new words immediately before we left class. A B C D 2. What were you buy at the souvenir shop yesterday? A B C D 3. My brother plays video games twice times a week. A B C D 4. He comes here with bicycle because he does not like walking. A B C D 5. There are a little fruit trees in my grandparents’ garden. A B C D 3. Fill in each gap with ONE suitable preposition. 1. It’s seven thirty and Minh is late_____________school. 2. We must clean hands _____________ having a meal. 3. He's waiting for her_____________the bus stop. 4.“How do you go to school?” - “ _____________ my father’s car.” 5. The population _____________the world is increasing. 4. Put the verbs in brackets in the right form. 1. I don’t live with my family now and we (not/see)________________each other for five years. 2. He (break) ___________ the biscuit in half and gave one piece to me. 3. Japanese (speak)_______________at the meeting tomorrow morning. 4. ______he (watch) _______the news regularly? 5. This is the second time he (lose)___________ his car key. 5. Complete the sentences with the suitable form of the words in brackets. 1. I don’t like this chair. It’s ________________(COMFORT) 2. What did you learn from your last ___________________? (DISCUSS) 3. Walking is a fun, easy and ____________________ activity. (EXPENSIVE) 4. He often drives_____________so he had an accident yesterday. (CARE) 5. I visit my granny______________a month (ONE) 6. This tree has a lot of yellow_____________ (LEAF) 7. My friend, Nga plays the piano very __________ (BEAUTY) 8. Air ___________ is a big problem in the big cities. (POLLUTE) 9. He always talks on the phone with his friend. He is very _____________ (TALK) 10. My classmate, Tim is the _____________________ player in the team. (BAD)