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senahoa
2 năm trước
1)hình chóp S.ABCD tứ giác đều có thể tích à 256cm3 và có cạnh đáy bằng 8cm.Tính chiều cao của hình chóp 2)Đ HOẶC S a-đáy của lăng trụ đứng là đa giác đều b-đáy của lăng trụ đứng là đa giác c-các mặt bên của hình chóp đều là tam giác đều d-các mặt bên của hình chóp đều là tam giác cân
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Energy is one of the problems that many people are interested in. It is not an unfamiliar word. It is heard, said, discussed day after day. It is close to everyone’s daily life. You turn on a lamp and it is energy that gives you light. You turn on a TV and it is energy that gives you pictures and sound. You ride a motorcycle and it is energy that gives you movement. You cook your meals and it is energy that gives you heat to boil rice. The problem is that the demand for energy is rising and that the price of energy is getting higher and higher. The supply of energy on earth is limited. It cannot provide us forever. The shortage of energy in the future is inevitable. Therefore, saving energy is a must if we want to continue to live in a safe and sound world. II. Read the passage again and answer the questions (1,0p) 1. How is the price of energy nowadays? →…………………………………………………………………………………………. 2. What should you do to save energy at home? →…………………………………………………………………………………………. C. WRITTING: I. Rewrite the sentences so that they have the same meaning as the original ones. (1,0p) 1. We will use renewable energy in the future → Renewable energy ………………………….………………………………………..… 2. This is our school. → This school is ……………………………..………………………………………….… II. Rearrange the words to make meaningful sentences. (2,0ps) 1. Solar energy/ in the world/ by many countries/ will be used/. →…………………………………………………………………………………………. 2. to another/ How/ you travel from / will/ one place/? →…………………………………………………………………………………………. 3. to save/ will reduce/ our energy/ the use of electricity/ We/. →…………………………………………………………………………………………. 4. traffic/ are/ rush-hours/ always/ There/ jams/ during. →………………………………………………………………………………………….

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