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hoang12
2 năm trước
mắt 1 người có điểm cực viễn là 50cm mắt người này bị tất gì? muốn nhìn vật ở rất xa, người đó phải đeo kính có tiêu cự là bao nhiêu?
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* Giúp mik với, hứa sẽ tim, vote 5 sao, cho ctlhn ạ Read the passage and choose the correct answer Manypeople still believe that natural resources will never be used up. Actually, the world's energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnham of the New England Institute of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the only alternative. However, many people don't approve of using nuclear power because it is very dangerous. What would happen if there were a serious nuclear accident ? Radioactivity causes cancer and may badly affect the future generations. The most effective thing is that we should use natural resources as economically as possible. 1. According to the passage, using nuclear power is ________ A. dangerous B. interesting C. safe D. cheap 2. Radioactivity from nuclear power ________ A. the future generations do nothing with it B. alters a new kind of energy C. are necessary to cure diseases D. causes cancer and has bad effect on the future generations 3. We should use coal, oil and gas ________ A. as economically as possible B. carelessly C. as much as possible D. all are incorrect 4. According to Professor Marvin Burnham, ________ A. We have to use coal, oil and gas as much as we can. B. We have to waste coal, oil and gas as much as we can. C. We have to start conserving coal, oil and gas before it is too late. D. We have to use coal, oil and gas as fast as we can. 5. How much fuel left? A. there is a lot of fuel B. Let’s use it as much as we would like C. No one knows exactly D. It will never be used up

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