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mickeytran2111
2 năm trước
Giúp em chọn đáp án đúng với ạ. Em xin cảm ơn. Đừng spam anh chị nhé :(
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Bài 1: Dây xoắn của một bếp điện dài 7 m, tiết diện 0,1 mm2 và điện trở suất là 1,1.10-6 Ω.m. a) Tính nhiệt lượng tỏa ra trong thời gian 25 phút khi mắc bếp điện vào hiệu điện thế 220V. b) Trong thời gian 25 phút, bếp này có thể đun sôi bao nhiêu lít nước từ nhiệt độ 25oC. Cho nhiệt dung riêng của nước là 4200J/kg.K. Bỏ qua sự mất mát nhiệt. Bài 2: Một bình nóng lạnh có ghi 220V – 1100W được sử dụng với hiệu điện thế 220V a) Tính thời gian để bình đun sôi 10 lít nước từ nhiệt độ 20oC, biết nhiệt dung riêng của nước là 4200J/kg.K, khối lượng riêng của nước là 1000kg/m3 và nhiệt lượng bị hao phí là rất nhỏ. b) Tính tiền điện phải trả cho việc sử dụng bình trên trong 30 ngày, biết rằng thời gian sử dụng trung bình mỗi ngày là 1 giờ, và giá tiền điện là 1500đ/kW.h Tóm tắt luôn ạ

Choose the correct answer. If no word is needed, choose “D”. 1. Oh, I didn’t tell you! We’ve got ____________ new English teacher. A. a B. an C. the D. no word 2. Here’s ____________ DVD you asked to borrow. A. a B. an C. the D. no word 3. We’re out of ____________ coffee, so you could get somen from the supermarket. A. a B. an C. the D. no word 4. The prize is ____________ unique opportunity to travel the world! A. a B. an C. the D. no word 5. It looks like ____________ glass in your bedroom window is cracked. A. a B. an C. the D. no word 6. It’s ____________ honour to be here this evening to speak to you. A. a B. an C. the D. no word 7. There’s ____________ good chance we’ll be late for the meeting. A. a B. an C. the D. no word 8. Reports are coming in of a major oil spill in ____________ Mediterranean. A. a B. an C. the D. no word 9. I went to see the doctor because I’m finding it difficult to sleep at ____________ night. A. a B. an C. the D. no word 10. Do you think that they’ll ever send a manned mission to ____________ Venus? A. a B. an C. the D. no word

làm xong explain chi tiết giùm mìnhQuestion 5: The commercial includes people dressed in colourful costumes to appeal __________ children. A. for B. in C. to D. at Question 6: __________ here right now, you could meet some of the most famous actors in the world. A. Were you B. Had you been C. Should you be D. Were you to be Question 7: She put a lot of effort into __________ her room so that people will instantly know that the room belongs to her when they step into it. A. personalising B. personifying C. personality D. personal Question 8: You should read this article, it’s very interesting and __________. A. well-wrote B. good-written C. well-writing D. well-written Question 9: The old building had __________ into disuse for years before it was eventually demolished. A. gone B. fallen C. dropped D. sunken Question 10: Don’t put __________ until tomorrow what can be done today. A. on B. away C. by D. off Question 11: We don’t have enough money to __________ such a cutting-edge machine. A. manage B. ensure C. afford D. carry Question 12: Anna, __________ daughter he sent a gift, thanked him for being so nice. A. to whom B. whose C. to whose D. whom Question 13: He __________ me as a very aggressive person at first due to his appearance. A. hit B. ticked C. struck D. clicked Question 14: As __________ to trying to do everything at once, he tends to focus on one task at a time. A. comparison B. contrast C. difference D. opposed Question 15: We __________ for three hours straight! Where’s the bus? A. have been waiting B. had been waiting C. has been waiting D. has waited Question 16: When somebody asks you to name a sunken ship, Titanic is most likely the first name that __________ to mind. A. jumps B. leaps C. springs D. bounces Question 17: I always find it very difficult ___________ a conversation with those who are older than me. A. to starting B. start C. starting D. to start Question 18: You can find __________ on how to develop healthy habits on this website. A. a great number of information B. many useful pieces of information C. very much informations D. a lot of informations Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. Question 19: I would’ve dropped out of college if he hadn’t helped me (pay) my tuition fee. A. cover B. donate C. purchase D. balance Question 20: I only have (rudimentary) knowledge on this subject, so I can’t really help you with these more complex problems. A. unclear B. obsolete C. elementary D. confusing Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. Question 21: The government has recently (brought in) new legislations to address the obesity epidemic. A. abolished B. rejected C. denied D. diminished Question 22: So far, all of the experiments conducted have produced (inconclusive) results. A. accurate B. promising C. definite D. detailed Question 23: ‒ Linh: “Oh no! I forgot to bring water for you.” ‒ Phuong: “Don’t worry! __________” A. You sure did! B. No harm done! C. No worries! D. No problem! Question 24: ‒ Nero: “__________” ‒ Jimmy: “Can you help me bring those suitcases to room 105?” A. May I take your order? B. Can you do me a favour? C. How can I help you? D. What brings you here?

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