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2 năm trước
Sau khi đánh tan quân Thanh, Quang Trung đã gặp khó khăn gì?
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We can develop alternative sources of energy, and unless we try we'll never succeed. Instead of burning fossil fuels we should be concentrating on more economic uses of electricity, because electricity can be produced from any sources of energy. . If we didn't waste so much energy, our resources would last longer. We can save more energy by conservation than we can produce for the same money. Unless we do research on solar energy, wind power, tidal power, hydroelectric plants... our fossil fuels will run out and we'll all freeze or starve to dealth. . Many countries are spending much more time and money on research because the energy from the sun, the waves and the winds last forever. We really won't survive unless we start working on cleaner and safer sources of energy. 1. Which of the following is not true? A. We'll never succeed in developing alternative sources of energy if we do not try B. More energy can be saved by conservation C. The energy from the sun, the wave and the wind can last forever D. We will survive if we don't we start working on cleaner and safer sources of energy

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