题型:阅读选择 题类:模拟题 难易度:困难
2019初中英语中考复习专题训练卷(七)阅读理解(三)说明议论类
Albert Einstein is right once again! He thought of the idea about gravitational waves years ago with his Theory of Relativity, but scientists are finally discovering that it really exists now. But what are gravitational waves, and why are they important?
Well, gravitational waves are made by black holes and can change time in space. Black holes aren't holes but are lots of matter put together into a very small area. They are created when a star, much like our sun, explodes and leaves behind this dense* material. It doesn't shine like a star any more, and it becomes black.
The black holes that made these waves are special. About 1.3 billion years ago, there were two black holes that kept moving closer and closer together. Finally, they hit each other and formed one big black hole. The energy is given off and created the ripples* in space. These ripples are gravitational waves. For example, imagine you throw a stone into a pool. It creates ripples that change the shape of the water. Well, that's kind of what the influence of one black hole hitting the other has in space.
Gravitational waves are hard to explore. But thanks to the efforts of scientists, the ripples were discovered on Feb. 11th, which is the first time in human history. Einstein was excellent to know this 100 years ago before we have the technology. It can give us a new view of the universe we live in. The discovery of gravitational waves, unlike stars, galaxies and other bright objects, black holes don't produce light, so we can't see them by tools. Gravitational waves allow scientists to look at the universe not only with light, but also with gravity. "Everything else in astronomy like the eye," A scientist told The New York Times. "Finally, astronomy grew ears. We had never ears before."
Now, we will be able to find black holes and things that are much further away from Earth, which means much more space exploration in the future. And who knows, this discovery could even lead to time travel!
World Book Day is on April 23rd every year. It was set up by the UNESCO(联合国教科文组织)in 1995 to encourage people, especially teenagers, to find out the fun of reading. It is also the day to honor great writers, for example, William Shakespeare, born or dead on that day.
Many countries celebrate World Book Day. Take the UK as an example. On that day, millions of schoolchildren can buy books at a much lower price than usual in any bookstore. It has been done every year since 1998.
World Book Day is also celebrated in China. Xi Jinping, Chinese President, does lots of reading every day though he is very busy. On World Book Day 2020, he called on young people to do more reading. "Books cannot change the world, but people can change the world by changing themselves through reading." he said.
Reading can be good for people in many ways. Reading gives us information about other cultures and places of the world. When we read, we may find many things that we don't know. We would have to use our head to think about them or do more reading to find out the answers. The more we read, the more we know. The more we know, the smarter we become. What's more, reading is also one of the most important ways to learn a foreign language like English. We all know that it is difficult to learn everything in the classroom, such as the ways English people are speaking and writing today. Reading helps us.
"Reading makes a full man." Bacon said. Therefore, it is necessary for us to spend time on reading every day.
World Book Day | |
Date | ·On April 23rd every year. |
{#blank#}1{#/blank#} for setting up the day | ·To encourage people to experience the {#blank#}2{#/blank#} of reading. ·To honor great writers. |
Differences between China and the UK | ·In the UK, schoolchildren can buy books at {#blank#}3{#/blank#} than usual in any bookstore. ·In China, President Xi Jinping, encouraged young people to read more and {#blank#}4{#/blank#} the world. |
Benefits(益处)of reading | ·Giving us {#blank#}5{#/blank#} about other cultures and places of the world. ·Helping us to find out the answers to unfamiliar things. ·Helping us to learn a foreign language well. |
Do you know how to start a club at school? Here are some helpful ideas for you:
Photo Club Many students don't know how to take photos. A photo club can help. You can give camera setting(设置) lessons to students. What you need: A classroom; some cameras; some apps. | |
LEGO Club Who doesn't love building with LEGO? In this club, you can have a LEGO-building match(比赛) every week, like making the best cars or the most beautiful restaurant with LEGO. What you need: A classroom; LEGO. | |
Gardening Club A gardening club can be a lot of fun for students. They can learn how to grow their own vegetables and flowers. They can also learn to work with other students. It's useful. What you need: Small farms; plants and seeds(种子); gardening tools(工具). |
School years around the world
I live in Alaska. Classes start in August. We have two breaks-a winter break and a spring break. The winter break is in December. The spring break is in March. Classes end in May. We don't go to school in the summer. Our summer vacation is very long! --Lauren | |
I'm from France. Classes start in September and end in July for summer vacation. We have breaks in October, December, February and April. I'm in middle school and I go to school five days a week. Elementary school students go to school four days a week. They don't go to school on Wednesdays! --Louis | |
I live in Australia. In my country, classes start in February and end in December. We don't have a long summer vacation, but we have three breaks! We have a fall break in April, a winter break in July and a spring break in September-October. --Oliver | |
I live in Spain. Our school year starts in September and ends in June. We have a long summer break from June to September. We also have two main breaks during the school year: a winter break in December and a spring break around Easter. We go to school five days a week, but we usually have a longer lunch break in the middle of the day. --Sofia |
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