题型:阅读选择 题类:模拟题 难易度:普通
广东省深圳市2021年中考英语模拟冲刺试题(一)
What color are icebergs (冰山)? White or blue? Surprisingly, there are green icebergs in Antarctica (南极). Their unusual color has confused scientists for years. But scientists have finally solved the mystery of the green icebergs.
Icebergs are large pieces of ice in the sea. Icebergs form after breaking away from glaciers (冰川).
Most icebergs are white. There are also many icebergs in Antarctica that are blue. Glacial ice has a lot of small air bubbles (气泡). The icebergs appear to be blue because the air bubbles reflect blue light.
However, there are no air bubbles in green icebergs, which means these icebergs are made out of sea ice rather than glacial ice.
But why does sea ice look green? Scientists at the University of Washington, US, recently found the reason— iron oxide (氧化铁). It comes from rock dust found on the Antarctic mainland. After studying the green icebergs, scientists found that they have 500 times more iron than glacial ice. The iron comes from bedrock in the ocean. When glaciers grind (碾磨) against bedrock, a powder (粉末) that is rich in iron is created. The powder later mixes with ocean water, which then freezes as green sea ice, Stephen Warren from the university suggested.
This is an important finding because these green icebergs can deliver iron to far parts of the ocean. There, tiny sea plants use the iron as a nutrient (营养物). We thought green icebergs were interesting. But now they may actually be important.
Nowadays, many people have realized the importance of leadership(领导)skills. Poor leaders may cause many problems. But good leaders do better in solving problems than poor ones. Without good leaders, problems can't be solved. {#blank#}1{#/blank#} What's more, good leaders are good at cooperating with others. Usually, they are good listeners as well. But being good leaders isn't easy. So let me give you some suggestions to help you become a good leader.
{#blank#}2{#/blank#} Maybe nobody teaches you how to be a good leader, but you can learn it on your own. Read books about great leaders from home and abroad. By reading, you can learn a lot from their experiences and find out their secrets of success. Then you will be more confident of being a good leader.
Learn from students' leaders in your school. There is no doubt that those leaders who are popular with the students in your school must have their advantages over others. {#blank#}3{#/blank#} Take an active part in the activities organized by the excellent leaders and learn from them at once. Then you will know the answer.
{#blank#}4{#/blank#} Find the students that have the same interests as you have and start a club. Activities should be organized regularly in the club. When the members in your club have trouble in solving problems, you should communicate with them and find out the causes of the problems. Maybe what you have learned can be helpful. After the problems are solved, you can share pleasure with them. As time passes by, you will get more trust like those popular leaders. Sooner or later, you will be a good leader.
{#blank#}5{#/blank#} Get started before it's too late! As long as you keep trying, you will develop your leadership skills.
A. Learn from books. B. Be more strict with yourself. C. Practice what you have learned. D. It's not necessary for you to take notes. E. So good leaders are very important. F. In short, being a good leader needs courage and practice. G. Don't you want to know why they are so successful? |
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