cho x,y>0 tìm giá trị nhỏ nhất của x/y +y/x +xy/x^2-xy+y^2

Choose the best answer : 1. A study shows that teenergers use text messaging to communicate with their friends more than A. To send email B. To write letters C. Emailing D.Texting

Các bạn giúp mình với mình đang cần gấp

V. Read the passage then answer the questions. (2.0p) Vietnam’s New Year is celebrated according to the Lunar calendar. It is especially known as Tet Nguyen Dan, or Tet. It begins between January twenty- first and February nineteen. The exact date changes from year to year. Vietnamese people usually make preparations for the holiday several weeks beforehand. They tidy their houses, cook special food, clean and make offerings on the family altars. On the New Year’s Eve, people sit up to midnight to see New Year in, then they put on new clothes and give one another the greetings of the season. Tet lasts ten days. The first three days are the most important. Vietnamese people believe that how people act during those days will influence the whole year. As a result, they make every effort to avoid arguments and smile as much as possible. 1. What is Vietnam’s New Year known as? ->.…………………………………..………………………………………………….. 2. Is Tet celebrated according to the Lunar calendar? ->………………………….……………………………………………………………… 3. What do Vietnamese people usually do to prepare for Tet? -> ………………………………………………………………………………………… 4. Do people sit up to midnight on the New Year’s Eve? ->……………………………………….. SECTION C. – WRITING VI. Make sentences using the words and phrases given. (1.0 point) 1. He/ has/ flu/./ he/ keep/ sneezing/ coughing/. 2. Listen/ music/ in/ free/ time/ is/ my/ favourite/ hobby/. 3. My brother/ enjoy/ play/ piano/ when/ he/ young/. 4. In/ future/,/ I travel/ around/ Viet Nam. VII. Rewrite each of the following sentences in such a way that means exactly the same as the sentence printed before it. (2.0 points) 1. The house is bigger than the flat. (not as …as) The flat 2. They sell tickets at the gate of the tourist site. Tickets 3.Nga enjoys going shopping on Sunday with her sister. -> Nga is interested 4. My sister's school is not the same as mine. - >My school is.....................................................................................

tính BCNN(34,50,85) giải bài ra nha

Cho hình vẽ: Tam giác ABC có 3 góc nhọn, các đường cao AD, CE, BF cắt nhau tại H. Các tứ giác nội tiếp theo dấu hiệu :" Tứ giác có 2 đỉnh kề nhau cùng nhìn 1 cạnh chứa 2 đỉnh còn lại dưới 1 góc α " là :

Giúp mình 3 câu này với Giải đầy đủ dễ hiểu giúp mình nhá. Viết ra vở càng tốt cho dễ nhìn MÌNH CẦN GẤP ❤

Sự phát triển của muỗi thuộc kiểu phát triển nào ?vì sao?

Ai xử lí số liệu rồi vẽ biểu đồ giúp mình với ạ :(((

You can look _____ a word in a dictionary if you don't know what it means. Chọn 1 câu trả lời đúng for into up over 2 You should have a(an)……………….check your motorbike regularly. Chọn 1 câu trả lời đúng plumber painter electrician mechanic 3 “Parasite” was ...……… for Best Picture for Oscars 2020 Chọn 1 câu trả lời đúng nominated marched approved stored 4 Lighting accounts …………10% to 15% of electricity bill. Chọn 1 câu trả lời đúng on of for about 5 He tried to go to class regularly ….. he was very busy. Chọn 1 câu trả lời đúng though and so but 6 Since the world’s energy resources are limited, we must _____ them. Chọn 1 câu trả lời đúng minimize conserve pass drip 7 If there is a mechanical problem, we suggest ________the manufacturer directly. Chọn 1 câu trả lời đúng contacting to contact be contacted contact 8 My sister kept on …. question after question. Chọn 1 câu trả lời đúng asks asking asked to ask 9 The children like to ……………….nice clothes when they go out Chọn 1 câu trả lời đúng put on put off put away put out 10 I suggest you …..to the hospital with your parents. Chọn 1 câu trả lời đúng to go should go going goes 11 I had the electrician …... at my broken light Chọn 1 câu trả lời đúng to look looked look looking 12 Do you know the music………….is being played on the radio? Chọn 1 câu trả lời đúng why who whom which 13 Tom is the ….. and pride of his parents. Chọn 1 câu trả lời đúng joyness joy joyful joyfully 14 ………..are very demanding. They want products that are both cheap and of good quality. Chọn 1 câu trả lời đúng consumption consumers consuming consume 15 It was ………..of you not to play the piano while I was sleeping Chọn 1 câu trả lời đúng inconsiderate considerate consideration considerable 16 Tuan is an ……………student. He takes part in many activities in his school Chọn 1 câu trả lời đúng action active inactive activist 17 Carol showed up for the meeting,…………... I asked her not to be there. Chọn 1 câu trả lời đúng because even though because of despite 18 The old man has just died. He lives next to my house. Chọn 1 câu trả lời đúng The old man which lived next to my house died The old man who has just died lives next to my house The old man lived next to my house has just died. The old man who lives next to my house has just died. 19 I found her cat in an empty room. Chọn 1 câu trả lời đúng I turned round her cat in n empty room. I brought up her cat in an empty room. I came across her cat in an empty room. I looked after her cat in an empty room. 20 "Why don't you use energy-saving bulbs, Mr. Son?", said Nam. Chọn 1 câu trả lời đúng Nam had Mr. Son replace energy-saving bulbs.. Nam remind Mr. Son to use energy-saving bulbs. Nam suggested that Mr. Son should use energy-saving bulbs. Nam asked Mr. Son not to use energy-saving bulbs.