题型:阅读选择 题类: 难易度:困难
浙江省金华市永康市第三中学2024-2025学年九年级上学期12月独立作业检测英语试卷
①It is widely known that China has the best high-speed railway network (网络) in the world. Now, the country is breaking its own speed(速度) record with CR450.
②CR450 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.
③"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.
④The 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℃. 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 of the brake system for calculations (计算).
⑤Besides 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.
way we but to high rise habit farm completely number |
With the development of society, our living conditions have improved, and our world has changed greatly. {#blank#}1{#/blank#} as for the environment, some problems have appeared together with the social development.
Human activities cause many problems for our planet. For example, sea level has {#blank#}2{#/blank#} by 15 cm over the past century. The Amazon rainforest level has reduced by 17% in the last 50 years because farmers cut down the trees for {#blank#}3{#/blank#}. People killed a lot of animals and the {#blank#}4{#/blank#} of animals has dropped.
The earth's temperature is {#blank#}5{#/blank#} than before, and it turns more ice into water, so the oceans and land have changed, too. Some animals and plants couldn't keep up with the changes, so they disappeared {#blank#}6{#/blank#}. Unless we change our {#blank#}7{#/blank#}, our future in a hundred years' time won't be hopeful. To solve the problem, we should take action at once. First of all we should choose green {#blank#}8{#/blank#} to go to work or go to school as much as possible. Next, we should say "No" {#blank#}9{#/blank#} water and food waste. What's more, we should build parks to protect some of the land. Trees will be planted in the parks, and those parks also give animals places to live. {#blank#}10{#/blank#} living environment will be better and greener.
Hu Bin likes sports. He is good at football, ping pong and basketball. l often goes running after school. He wants to work in a gym. Tip: If you like sports, you can be a coach, a sports reporter, or a PE teacher. |
Sarah likes using computers and she can type quickly, She wants to work in an office. Tip: If you can type quickly, you can be a secretary(秘书). |
Robin wants to be a scientist like Wu Yifan's grandfather, He studies very hard, and he wants to work in a university. Tip: If you like science, you can be a scientist(科学家). |
WHAT'S ON THIS WEEKEND? |
Films at the Museum Two European films will be on this Saturday afternoon at the Museum Theatre. See Broken Window at 1:30. The workers will be at 3:45. For further information, call 498-7898. |
Captain Good Fellow Do your children enjoy interesting stories, funny games, and exciting dances? Captain Good Fellow will be ready to teach all these things to children of all ages at the City Square on Saturday morning at 10:00. Free. |
International Picnic Are you tired of eating the same food every day? Come to Central Park on Saturday and enjoy food from all over the world. Delicious and not expensive. Noon to 5:00 pm. |
Do You Want to Hear "The Zoo" "The Zoo", a popular rock group from Australia, will give their first US concert at 8:00 pm. at Rose Hall, City College, Sunday. |
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