Cho đa thức A(x)=m.x^2+nx+p m+n=0.Chứng minh rằng A(-2).A(3)>=0

1 bao xi măng nặng 50kg , 1 bao cát nặng 32kg . Vậy để 5 bao cát nặng bằng 4 bao xi măng ta phải thêm .....kg ?

III. Give the correct form of the words given to complete the sentences: 1. The beaches in Viet Nam are really……………………………and beautiful. (PEACE) 2. ……………………….is still a major problem in most big cities. (POOR) 3. Living in the slums is …………………………….and unsafe. (HEALTH) 4. ……………………(or the state of having no home) is a significant social issue worldwide. (HOME) 5. In this city, only a small number of people are …………………….., with high living standards in the city. (WEALTH) VI. Read the following passage, then choose a word from the box and write the correct word next to numbers 1-5. There is one exemple. roofs garden non - polluting polluting the moon are renewable the sun Solar energy is a long lasting source (0)..of.. energy, and it can be used almost anywhere. To generate solar energy, we only need solar cells and (1).....................! Solar cells can easily be installed on house (2) ................., so we don’t need any new space. Compared to other (3)...................... sources, they also possess many advantages: wind and water power rely on turbines which (4).................noisy, expensive and which take up large space. Solar cells are totally silent and (5).......................... As they have no moving parts, they require little maintenance and have a long lifetime.

giúp mik vs mik đang rất cần gấp

cần gấp !!! giải đầy đủ và chi tiết ra giúp mình nha giải đầy đủ và chi tiết ms đc 5sao và câu trả lời hay nhất nhoa

Mong mn giải giúp mình với hay thì mình vote cao

Tìm các tính từ có trong câu văn sau : Cô ấy thật ngoang ngoãn , xinh xắn , đáng yêu .

I. Choose the correct answer A, B, C or D to complete each sentence. 1. Remember not to park in front of a zebra…………….. A. crossing B. cross C. crossed D. across 2. …………….we lost the game, we were happy that we played well. A. Although B. Because C. If D. Nevertheless 3. We………..drink water from the tap without boiling it first. A. never should B. should never C. should not to D. not should 5. “Recycling” means creating new products from…………….materials. A. use B. using C. used D. to use 7. Drinking and driving of one of the most common……………….of traffic accidents. A. reasons B. effects C. sources D. causes 8. Solar energy - one type…………………sources – is being used more and more. A. renewable B. non-renewable C. renewing D. renewed 9. –“Does that red motorbike belong to your mother?” - “No, ………………….is white.” A. she B. her C. hers D. mine 10. Overpopulation causes a lot of problems,………..? A. isn’t it B. doesn’t it C. do they D. don’t they 11.Nuclear power ...............................in the future. A. will replace B. replaced C. will be replaced D. replaces 12.My father .............a lot last year, but this year he doesn’t any more. A. smokes B. used to smoke C. smoking D. gets used to smoke 13.It’s really difficult to .......................a bicycle up the hill A. fly B. drive C. pedal D. sail 14.At this time next week, we .................a test on sources of energy A. will take B. take C. will be taking D. are taking 15.My children often sleep while they are ................a plane. A. in B. on C. by D. 0 16............books are here. ..............are there. A.Theirs / ours B. Their / our C. Theirs / our D. Their / ours II. Finish the second sentence in each pair, so that it has similar meaning to the first one, using the beginning given and the word in capital letters. 1. Taking photographs inside the museum is forbidden. (NOT) You ………………………………………………………………. 2. One Saturday night, the roads to the city center are very busy. (TRAFFIC) There is……………………………………………………………. 3. Do you find it easy to make friends? (GOOD) Are you……………………………………………………………?

Câu 33: Lần đầu tiên truyền đơn, cờ đỏ búa liềm của Đảng Cộng sản đã xuất hiện trên các đường phố Hà Nội và những địa phương khác trong phong trào đấu tranh của công nhân, nông dân Việt Nam vào thời gian nào? A. Tháng 2 đến tháng 4/1930 B. Cuối 1929 đầu 1930 C. 1/5/1930 D. 12/9/1930

IV. Choose the best annser. 6. Lan ________ her teeth after meal. A. brush B. brushs C. brushes D. brushing 7. She is a student. So_______ he. A. is B. do C. are D. does 8. The student ________ to school on Sunday A. don't go B. not go C. isn't go D. goes 9. Nga________ to her friends now. A. are talking B. talk C. is talking D. talks 10. Who ________ he live with in Ho Chi Minh City? A. does B. do C. is D. are 11. –“________ does he go to school?” –“I go by bike.” A. When B. How C. What D. Who 12. Ha Noi is a big city, but it is________ than Ho Chi Minh City. A. the smaller B. the smallest C. smallest D. smaller 13. Her parents live ________ Ha Noi A. in B. at C. on D. of 14. I like swimming, and ________ does my brother. A. too B. so C. but D. to II. Find a mistake in the four underlined parts of each sentence and correct it.