《2025年暑假总动员宁夏人民教育出版社八年级英语外研版》

一、阅读理解(每小题2分，满分10分)
On December 29, 2024, two samples(样品) of the CR450 high-speed train were shown in Beijing. This wonderful train can reach a test speed of 450 kilometres per hour and an operating speed of 400 km/h. When it starts to be used for business, it will be the quickest high-speed train in the world, much faster than the CR400 that runs at 350 km/h.
The China State Railway Group, which made this train, said that the CR450 has set new global standards in many important parts like speed, using less energy, making less noise, and braking(刹车) performance. Even though it goes at a higher speed, its braking is as good as the 350 km/h trains. This is because of the great engineering work that keeps the train steady and safe even when it's fast.
The CR450 also cares a lot about making passengers feel comfortable. By using good noise-cutting technology, the inside of the train is as quiet as the 350 km/h trains. What's more, its running resistance(阻力) has been decreased by 22 percent and its weight has been reduced by 10 percent, which helps to save energy. The inside has been made again, with 4 percent more room, and there are better places to put luggage.
Two samples were shown on that day. They were made by different companies, but both want to give passengers a nice trip. The China State Railway Group will do more tests to make sure the train is okay for business use.
Since 2012, China's railway has made many new things, like the Fuxing high-speed train, and has built a whole high-speed rail technology system. The CR450 shows China's ability to make new things and its science power. It also shows the good points of China's system, which helps the railway grow.
In the past 15 years, China has built a very big railway network, including the world's largest and best high-speed rail network, which is very long. The CR450 is an important step in China's railway growth.
( )1. What is the operating speed of the CR450 high-speed train?
A. 450 km/h. B. 400 km/h.
C. 350 km/h. D. 300 km/h.
( )2. We can infer(推断) from the passage that the CR450 ______.
A. costs more than the CR400
B. is more popular than the CR400
C. is safer than the CR400
D. has more seats than the CR400
( )3. What does the underlined word “steady” in Paragraph 2 probably mean?
A. 迅速的 B. 平稳的
C. 复杂的 D. 灵活的
( )4. Why is the carriages(车厢) of the CR450 high-speed train quieter than that of the 350 km/h trains?
A. Because it is lighter.
B. Because it travels at a higher speed.
C. Because it has less running resistance.
D. Because it uses advanced noise-reducing technology.
( )5. What is the main idea of the passage?
A. The introduction of the CR450 high-speed train.
B. The history of China's high-speed rail.
C. The comparison(比较) between the CR450 and other trains.
D. The future of China's railway.

答案： 1. B 2. C 3. B 4. D 5. A