What does the author mean by saying that electricity is flexible?
Giải bởi Vietjack
Đáp án C
Tác giả có ý gì khi nói rằng điện linh hoạt?
A. Nó rẻ và dễ sử dụng.
B. Nó được sử dụng để điều khiển động cơ.
C. Nó có thể được điều chỉnh dễ sử dụng với các mục đích khác nhau.
D. Nó có thể được thực hiện một cách dễ dàng.
Thông tin: On the other hand, we make use of electricity in thousands of ways. 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. An electric current can be made with equal ease to heat a huge mass of molten metal in a furnace, or to boil a jug for a cup of coffee.
Tạm dịch: Mặt khác, chúng ta lại sử dụng điện bằng hàng ngàn cách khác nhau. Từ việc dùng điện áp mạnh để điều khiển những đoàn tàu điện hiện đại đến dòng điện nhỏ chỉ để làm một con tính đơn giản, và từ dòng điện từ trường lớn trong các nhà máy thép có thể nâng đến 10 tấn tới dòng từ trường trong một chiếc chuông cửa, tất cả đều là năng lượng điện. Một dòng điện có thể dễ dàng làm nóng chảy một khối lượng kim loại lớn trong lò luyện hay chỉ đơn giản đun sôi lượng nước cho một tách cafe.
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WAYS TO IMPROVE YOUR MEMORY
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from their history lessons! Take an active interest in what you want to remember and (36) ______ on it consciously. One way to make yourself more interested is to ask questions — the more the better!
Physical exercise is also important for your memory because it increases your heart rate and sends (37) ________ oxygen to your brain, and that makes your memory work better. Exercise also reduces stress, which is very bad for the memory.
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(Source: - New Cutting Edge, Cunningham, S. & Moor. 2010. Harlow: Longman)
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