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nvnghia.yd3
2 năm trước
Người ta muốn tải công suất điện 2MW từmộtnhà máy điện đến khu công nghiệp. Hiệu điện thếgiữa 2 đầu dây tải điện là 380V. Điện trởtrên đường dây tải là 40Ω.1. Tính công suất hao phí do tỏa nhiệt trên đường dây?2. Nếu dùng máy biến thếtăng hiệu điện thếlên 25000V với cuộn sơ cấp của một máy biến thếcó sốvòng dây là 800 vòng, Tính sốvòng dây cuộn thứcấp ? Tínhcông suất hao phí lúc đó
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I. Find the word which has a different sound in the underlined part.(1pt) 1. A. loved B. liked C. wished D. gripped 2. A. bored B. amazed C. excited D. enjoyed 3. A. filled B. opened C. played D. wanted 4. A. ended B. shocked C. laughed D. missed II. Choose the correct word.(2pts) 1. We were all (horrifying/horrified) when we heard about the disaster. 2. It’s sometimes (embarrassing/embarrassed) when you have to ask people for money. 3. Are you (interesting/interested) in football? 4. I enjoyed the football match. It was quite (exciting/excited). 5. It was a really (terrifying/terrified) experience. Afterwards everybody was very (shocking/shocked). 6. I had never expected to be offered the job. I was really (amazing/amazed) when I was offered it. 7. The kitchen hadn’t been cleaned for ages. It was really (disgusting/ disgusted). 8. Do you easily get (embarrassing/embarrassed)? III. Choose the best one (A, B, C or D) to complete the sentence.(4pts) 1. A film in which strange and frightening things happen is called a/an . A. thriller B. comedy C. drama D. animation 2. Not many people went to see the film; , it received good reviews from critics. A. however B. despite C. but D. although 3. he spent much money on the film, it wasn’t a big success. A. Even B. But C. Although D. Despite 4. Trung finds horror films really . A. disgust B. disgusts C. disgusting D. disgusted 5. they spent a lot of money on the film, it wasn’t a big success. A. However B. Nevertheless C. When D. Although 6. We didn’t find it funny it was a comedy. A. in spite of B. despite C. although D. but 7. The end of the film was so that many people cried. A. shocking B. moving C. exciting D. boring 8. I went to the cinema with my friends yesterday feeling very tired. A. although B. in spite of C. but D. so IV. Make one sentence from two. Use the word(s) in brackets in your sentences.(3pts) 1. I couldn’t sleep. I was very tired. (despite) 2. They have very little money. They are happy. (in spite of) 3. My foot was injured. I managed to walk to the nearest village. (although) 4. I enjoyed the film. The story was silly. (in spite of) 5. We live in the same street. We hardly ever see each other. (despite) 6. I got very wet in the rain. I was only out for five minutes. (although)

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