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duypro3311
2 năm trước
Cho tam giác ABC vuông tại A nội tiếp đường tròn (O:R). Tia phân giác của góc ACB cắt AB tại D và cất (O:R) tại E, Ha Tia CA và BE cất nhau tại S. a) Chứng minh tứ giác ASED nội tiếp. b) Gọi 7 là trung điểm của 4. Chứng minh ba điểm E,I,O thẳng hàng.
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Read the passage and tick (V) True and False 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. Statements: True False 1. Many people aren’t interested in the problems of energy. 2. The word “energy” is familiar and close to everyone’s daily life. 3. Energy is heard, said, discussed day after day. 4. We can’t watch TV without energy. 5. The supply of energy on earth is unlimited. It can provide us forever. 6. If we want to continue to live in a safe and sound world, we have to save energy.

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