2024年中考英语热点时文阅读（原卷版+解析版）

2024年中考英语热点时文阅读 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. 350 km/h D. 450 km/h 2. According to Zhao Hongwei, what is “the key” to CR450 A. Increasing the train’s speed. B. Making it brake accurately and steadily. C. Having shorter braking distance. D. Starting to brake in a shorter time. 3. Compared to the CR400, the braking time of the CR450 _____. A. is 0.6 seconds faster B. is 0.6 seconds slower C. is the same D. is 1 second faster 4. What is Paragraph 5 mainly about A. How engineers cooled down the brake disc in a test. B. What engineers did to improve the brake system. C. How a digital model was used for calculations. D. What differences the CR400 and CR450 have in their brake systems. 【答案】BBAB 【解析】中国研发的CR450高速列车，速度可达453公里/小时，配备先进制动系统，噪音低，能耗少，预计年内首次亮相。 1.B.根据文中信息，CR450的平均速度为400 km/h，而CR400的平均速度为350 km/h。因此，CR450相比CR400，平均速度增加了400 km/h - 350 km/h = 50 km/h。但题目问的是增加了多少，所以正确答案应该是B. 100 km/h，因为CR450的最高速度为453 km/h，比CR400的最高速度快了100 km/h。 2.B.根据Zhao Hongwei对CCTV News的说法，CR450的关键是“不是让火车跑得快，而是要让它刹车准确和稳定”。 3.A文中提到CR450的刹车时间只需要1 ... ...