20xx年普通高等學(xué)校招生伯樂(lè)馬押題考試-(一)英語(yǔ)(編輯修改稿)
2025-04-05 05:45 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 rovides backgrounds about what we39。re seeing. This may not pare with physically being there, but these videos still create a nice and surprisingly realistic experience.Google Earth has simpler virtual tours for 31 . national parks, plete w讓h high quality photos, 360degree views and information about each path. While they are worth seeing, too, they aren39。t as immersive（(浸入式的）as the new Hidden Worlds project, which takes a deeper dive into the parks. You generally can39。t get as close to the scene as you do in The Hidden Worlds, but you can zoom in to see different aspects of the places you pick.You can also take online tours from the U. S. National Park Service （ NPS） itself, typically on the official websites of certain parks. These tend to be much simpler than many virtual tours, often providing a collection of photos, videos, maps and educational materials rather than interactive experiences.None of these may not satisfy our desire for freedom and wilderness, but as long as we39。re stuck at home, it39。s at least nice to briefly lose ourselves in these virtual replicas. They can help calm and entertain us during anxious times, but they also serve as valuable reminders that natural wonders are still out there waiting for us.28. What does a ranger do in The Hidden Worlds?A. Preserve the parks. B. Introduce the scenic spots.C. Give instructions on safety. D. Make a video of the tourists.29. What is special about Google Earth?A. It provides more realistic experience.B. It allows users to set foot in the depths.C. It can be used to expand the chosen places.D. It can present clear pictures about the path.30. What does the underlined word replicas in the last paragraph refer toA. Purchases. B. Reproductions. C. Solids. D. Documents.31. What can be a suitable title for the text?A. The Rise and Fall of Tourism B. The Social Distance and ToursC. Reducing your Boredom at Home D. Explore National Parks with Virtual ToursDA solar tower, also known as a solar power tower, is a system that transforms sunlight into electricity. The technology is mainly made up of the tower, mirrors, the receiver, cold and hot storage tanks, steam generator and turbine（渦輪）generator.This solar tower is placed in the center of a large collection of mirrors. As these mirrors track the Sun, they catch the incident sunlight and reflect it back to a receiver at the top of the solar tower. In this receiver, a fluid（流體）is heated and used to generate steam. This steam then powers a conventional turbine generator to generate electricity.A variety of fluids were tested to transport the sun39。s heat, including water, air, oil, and sodium, before a salt mixture called molten salt was picked out. Present solar towers use molten salts because of their increased heat transfer and energy storage abilities. In a molten salt solar power tower, liquid salt at 290176。C is pumped from a cold tank through the receiver where it is heated to 565176。C and then on to a hot tank for storage. When power is needed from the plant, hot salt is pumped to a steam generator that produces superheated steam to drive a turbine. At sunset, the liquid salt is returned from the steam generator to the cold tank where it is stored for tomorrow39。s use.Like all solar technologies, solar power towers are fueled by sunshine and do not give off greenhouse gases. They are unique in their ability to effectively store solar energy and distribute electricity somewhere when needed, even at night or during cloudy weather.However, the water demand of these plants can be seen as a problem, as solar towers require large amounts of water to operate. Hopefully, alternative cooling technologies are being studied to reduce the amount of water being used. The most challenging problem is the harmful effect these towers have on birds. Birds that fly in the way of the focused rays of Sun can be burnt to ashes. ?32. What is Paragraph 2 mainly about?A. How a solar tower works. B. What a solar power tower is.C. Why mirrors reflect sunlight. D.
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