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Câu hỏi:
"Electric magnets" in paragraph 2 are used in steel works to ______.
- A. lift heavy weights up to ten tons
- B. test the steel for strength
- C. heat the molten steel
- D. boil a jug of water
Lời giải tham khảo:
Đáp án đúng: A
Kiến thức: Đọc hiểu
Giải thích:
"Electric magnets" (Nam châm điện) trong đoạn 2 được sử dụng trong các công trình thép để ______.
A. nâng vật nặng lên đến mười tấn
B. kiểm tra độ bền của thép
C. đun nóng thép nóng chảy
D. đun sôi một bình nước
Thông tin: From the powerful voltages that drive our electric trains to the tiny current needed to work a simple calculator, and from the huge electric magnet in steel works that can lift 10 tons to the tiny electric magnet in a doorbell, all are powered by electricity.
Tạm dịch: Từ những hiệu điện thế mạnh điều khiển từ các đoàn tàu điện của chúng ta đến dòng điện cực nhỏ cần hoạt động với một máy tính đơn giản, và từ nam châm điện khổng lồ bằng thép có thể nâng 10 tấn đến nam châm điện nhỏ trong chuông cửa, tất cả đều chạy bằng điện.
Chọn A
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