《2025年学霸组合训练八年级英语下册译林版苏州专版》

二、阅读理解
|题目|体裁|字数|难度|建议用时|实际用时|正确率|
| ---- | ---- | ---- | ---- | ---- | ---- | ---- |
|中国的高速列车|说明文|285|★★★★|7分钟|____分钟|____/4|


China’s high - speed trains stand out in the world. The country is now breaking its own speed record with CR450.

The CR450 can travel at 400 kilometres per hour (km/h) on average(平均). Its highest speed is 453 km/h. Before this, the fastest high - speed train in the world was China’s CR400, which runs at 350 km/h on average.

“The key is not to make the train run fast but to have it brake(刹车) well,” Zhao Hongwei of the China Academy of Railway Sciences told CCTV News.

The CR450 has the same braking distance as the CR400. This distance is 6,500 metres. Although the CR450 travels faster, it can start braking more quickly. It takes only 1.7 seconds to start braking, while the CR400 takes 2.3 seconds.

The engineers also did lots of tests with the brakes to make the system(系统) better. In the tests, the brake disc(制动盘) got really hot, reaching temperatures of up to 700 ℃. Its colour changed from black to red. The changes were then recorded. The engineers put all the data(数据) into the system. Then, the system could make calculations(计算) to make the brakes even better.

The CR450 can make people’s lives easier. Once put into use, for example, the CR450 will shorten the travel time from Beijing to Shanghai. It now takes at least four and a half hours to travel between the two cities, but with CR450, it will only take two and a half hours. Also, the CR450 has the same noise level as the CR400.
(　　　)1. What does the underlined phrase “stand out” mean in Paragraph 1?
A. Something raises discussion.
B. Something happens.
C. Something is better than others.
D. Something is in trouble.
(　　　)2. The braking time of the CR450 is ________ than that of the CR400.
A. 1.7 seconds faster
B. 0.6 seconds slower
C. 2.3 seconds slower
D. 0.6 seconds faster
(　　　)3. What is Paragraph 5 mainly about?
A. What engineers did to make the brake system better.
B. How engineers collected data and did calculations.
C. How engineers cooled down the brake disc in a test.
D. The differences between the CR400 and the CR450.
(　　　)4. What is the best title for the text?
A. How to shorten travel time
B. Woosh! World’s fastest train
C. CR400 breaks its own record
D. Average speed of high - speed trains

答案： 阅读理解1~4CDAB
【文章大意】本文是一篇说明文，介绍了中国的高速列车时速在世界上脱颖而出。
1. C 词义猜测题。根据“The CR450 can travel at 400 kilometres per hour (km/h) on average. Its highest speed is 453 km/h. Before this, the fastest high - speed train in the world was China's CR400, which runs at 350 km/h on average.”可知，CR450平均时速400公里，最高时速453公里。在此之前，世界上最快的高速列车是中国的CR400，平均时速350公里。由此可见，中国的高速列车在世界上脱颖而出。故选C。
2. D 数字计算题。根据“It takes only 1.7 seconds to start braking, while the CR400 takes 2.3 seconds.”可知，CR400的制动时间为2.3秒，而CR450的制动时间为1.7秒，后者比前者快0.6秒。故选D。
3. A 段落大意题。根据第五段“The engineers also did lots of tests with the brakes to make the system better ... to make the brakes even better.”可知，该段讲述了工程师们对刹车做了大量的测试，以使系统更好。故选A。
4. B 标题归纳题。根据“China's high - speed trains stand out in the world. The country is now breaking its own speed record with CR450.”并通读全文可知，本文介绍了中国的高速列车时速在世界上脱颖而出。故选B。