user-avatar
477385279489969
2 năm trước
Tìm giá trị nhỏ nhất của các biểu thức sau: A = x ² + 2x +3 B = x ² - 4x + 5
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

I. Circle the word that contains a different sound in the underlined part. (2 pts) 1. A. said B. paid C. mermaid D. laid 2. A. food B. stool C. took D. school 3. A. dry B. type C. sky D. worry 4. A. hear B. fear C. wear D. near II. Odd one out. (2 pts) 1. A. cornflakes B. cereal C. vegetables D. bottle 2. A. printer B. click C. screen D. speaker 3. A. astronaut B. rocket C. metal D. planet 4. A. comfortable B. trophy C. wooden D. modern III. Circle the best answer to complete these sentences. (5 pts) 1. When I .................. home, my father .................... my mother with the cooking. A. came - was helping C. come - helping B. coming - was helping D. came - is helping 2. The last time Minh and his best friend met each other was ten months...... A. next B. later C. ago D. for 3. This is the woman .............. first climbed the Mount Everest. A. which B. who C. whom D. whose 4. - A: Mom, can I watch TV for a while now? - B: .................... You must finish your homework now. A. Yes, you can. B. Sure C. No, thanks. D. No, you can't 5. If you want to know more about how and where dinosaurs lived in the past, go to the ... A. zoo B. museum C. park D. countryside 6. - Is this ............ ............ shirt you have got in your shop? - No, sir. We've got some others cheaper. A. the cheapest B. cheap C. cheaper D. the cheap 7. In the future, robots ............. help us do many things like cooking, working and studying. A. was B. are C. will D. did 8. Many foreigners love to visit Hanoi because they think this city is very......... A. bored B. peaceful C. polluted D. boring 9. I have two aunts, both of .................... houses are in the city center. A. us B. they C.it D. their 10. Look at the note below and choose the correct meaning. Becky, Don't forget your Aunt Jane's coming to stay tonight, so can you make sure the house is neat when you go out this afternoon? Mum Mum is writing to..... A. tell Becky to stay at home to see her aunt. B. ask Becky to tidy the house before she leaves. C. remind Becky to go to her aunt's house. D. ask Becky to go out before she tidies the house. IV. Rearrange the given words to make up meaningful sentences. (2 pts) 1. playing/in/games/ are/ garden /They/ some / the __________________________________ 2. Remember/turn / light / before/go/bed /to / off / you/to/the/./ __________________________________ V. Rewrite these sentences in another way without changing their meanings. (2 pts) 1. I started to study at this school five years ago. → I have ___________________________ 2. The weather is quite hot today, so we should go for a swim in the pool. → Because __________________________________ VI. Read the passage and fill in the gap with a suitable word in the box. (3 pts) much - brush - starts - carefully - causes - many - food - lose Tooth decay (1) ..................... early in life. It continues throughout adult life, so many of us (2) .................. quite a few of our teeth by the time we reach old age. There are two (3) ......... ...... of tooth decay. One cause is that many of us don't take proper care of our teeth. Besides that, we eat a lot of sugary (4) ..........................., thus result in tooth decay. Ever since we are young, we should be encouraged to (5) ......................... our teeth properly and regularly. However, most of us don't pay (6) .............. attention to this advice and neglect our teeth. VII. Read the passage below and write True or False for these statements. (2 pts) It is a custom in Britain and in most European countries to celebrate a person's birthday. Members of the family and close friends are supposed to be present at the party. If they can't come, they may send a gift by post. At the birthday party, the person who gives birthday party opens all the gifts in front of all the people present and thank them for the gifts. The mother usually makes a birthday cake, or if she can't, she may order one from a cake-shop. A number of candles are placed on the top of the cake and they will be lit when the party starts. The number of the candles is also the age of that person. After the light is out, they sing the song "Happy birthday to you!" then play some games or sing or dance together. Answers 1. Celebrating a person's birthday is a custom in every country. 2. If the guests can't come, they may send a gift by post. 3. The person who gives birthday party shouldn't open the gifts in front of all the people at the party. 4. The number of the candles on the cake means the number of the family members. VIII. Write a short paragraph (about 4-5 sentences) to talk about the place you want to visit this summer vacation. (2 pts)

IV. Rearrange the given words to make up meaningful sentences. (2 pts) 1. playing / in / games / are / garden / They / some / the /. / ……………………………………………………………………………………… 2. Remember / turn / light / before / go / bed / to / off / you / to / the / . / ……………………………………………………………………………………… V. Rewrite these sentences in another way without changing their meanings. (2 pts) 1. I started to study at this school five years ago. I have …………………………………………………………………………………… 2. The weather is quite hot today, so we should go for a swim in the pool. Because ……………………………………………………………………………….…… VI. Read the passage and fill in the gap with a suitable word in the box. (3 pts) much brush starts carefully causes many food lose Tooth decay (1) …………….... early in life. It continues throughout adult life, so many of us (2) ………….…. quite a few of our teeth by the time we reach old age. There are two (3) …………..…. of tooth decay. One cause is that many of us don’t take proper care of our teeth. Besides that, we eat a lot of sugary (4) ………………..…., thus result in tooth decay. Ever since we are young, we should be encouraged to (5) ……………..….. our teeth properly and regularly. However, most of us don’t pay (6) ……………………. attention to this advice and neglect our teeth. VII. Read the passage below and write True or False for these statements. (2 pts) It is a custom in Britain and in most European countries to celebrate a person's birthday. Members of the family and close friends are supposed to be present at the party. If they can't come, they may send a gift by post. At the birthday party, the person who gives birthday party opens all the gifts in front of all the people present and thank them for the gifts. The mother usually makes a birthday cake, or if she can't, she may order one from a cake-shop. A number of candles are placed on the top of the cake and they will be lit when the party starts. The number of the candles is also the age of that person. After the light is out, they sing the song "Happy birthday to you!" then play some games or sing or dance together. Statements Answers 1. Celebrating a person's birthday is a custom in every country. 2. If the guests can't come, they may send a gift by post. 3. The person who gives birthday party shouldn’t open the gifts in front of all the people at the party. 4. The number of the candles on the cake means the number of the family members. VIII. Write a short paragraph (about 4-5 sentences) to talk about the place you want to visit this summer vacation. (2 pts) lưu ý: bài cuối ko chép mạng nha

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team