北京市平谷区2021-2023年中考英语二模试题分类汇编：阅读表达

北京市平谷区 2021-2023年中考英语二模试题分类汇编 阅读表达 2023年北京市平谷区中考二模英语试题 四、阅读短文, 根据短文内容回答问题。（共10分, 34〜36每小题2分, 37小题4分） All energy sources have their pros and cons—their good points and bad points. Modern societies have to make many decisions about how best to produce energy. The needs of the society have to be balanced against the need to protect the environment. Fossil fuels — coal, oil and natural gas— are a leading energy source around the world. They are called fossil fuels because they were formed from the remains of plants and animals that died many millions of years ago. Since then, great heat and pressure（压力） deep in the ground have changed them. So the fossil fuels we use today are found underground. One of the main advantages of fossil fuels is that they are abundant —found in many places and in large amounts. In addition, they contain a lot of usable energy. Coal is especially abundant. A special advantage of natural gas is that it bums very cleanly. When natural gas burns, it produces mostly carbon dioxide and water vapor. Oil’s main advantage is that it burns efficiently —meaning that little is wasted in the change to energy. Also, the refining （提炼）process that makes gasoline （汽油）and diesel produces other petroleum products, which are used in crayons, bubble gum, eye glasses, and even artificial heart valves. All fossil fuels are basically non-renewable （不可再生的） because nature cannot create enough to keep up with demand. Many experts think that the world's oil wells will be empty in a few decades（十年）. But, even before then, the oil supply will be too small to meet global demands. Also, fossil fuels produce pollutants. Cars, factories, and many power plants release harmful chemicals into the air. As long as fossil fuels are burned, air pollution will continue to be a problem. Another problem is the greenhouse effect. Gases released from burning fossil fuels trap （储存） more heat in Earth's atmosphere than would be trapped naturally. This heating up of Earth's atmospher