18-备战2024年中考英语新热点时文阅读

初中英语时文阅读18 文章导读 阅读理解 A篇: 世界最快高铁来了，最高时速450公里！ B篇：有担当，有梦想，新一代的榜样让青春闪光。 C篇：用AI生成音乐，感受人类创造力的伟大。 D篇：嫦娥六号首次到月球背面“挖土”。 E篇：欧洲青年发明家用AI助力垃圾分类。 F篇：太空垃圾成灾，该如何清理？ G篇：科幻照进现实！“空中的士”即将启航 H篇：我们的正确决定从何而来，什么影响我们的决定。 A 阅读理解 It is widely known that China has the most advanced high-speed railway network in the world. Now, the country is breaking its own speed record with CR450. CR450 can travel at 400 kilometers per hour on average, with a top speed hitting 453km/h. Before this, the fastest high-speed train operating in a rail network in the world is China’s CR400, which runs at 350 km/h on average. Once put into use, for example, the CR450 will shorten the travel time from Beijing to Shanghai to just about two and a half hours, which takes at least four and a half hours at the moment. “The key is not to make the train run fast but to have it brake (刹车) accurately (精准地) and steadily (平稳地),” Zhao Hongwei of the China Academy of Railway Sciences told CCTV News. The standard is that the CR450 should have the same brake distance as the CR400, which is 6,500 meters, even though it travels a lot faster. It can also start braking more quickly, taking just 1.7 seconds compared to the 2.3 seconds needed for the CR400. The engineers did lots of tests with the brakes to make the system better. In the tests, the brake disc (制动盘) got really hot, reaching temperatures of up to 700 C. Its color changed from black to red. The changes were then recorded. All the data were saved in a smart system to make a digital model (数字模型) of the brake system for calculations (计算). Apart from having a better braking system, the CR450 has the same noise level as the CR400. Moreover, it is 12 percent lighter and 20 percent less energy-consuming (耗能的), according to CCTV News. With all its advantages, people are getting excited about the train’s debut (首次亮相), which is planned to be within this year. 1. Compared to the CR400, the average speed of the CR450 increased by _____. A. 50 km/h B. 100 km/h C. 3