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   Astronomers working at Berkeley and Geneva have found nine new planets circling nearby stars. With this discovery,we now know of 50 extra-solar planets,also called exoplanets. That is a big increase from 41 planets last known five years ago.

   All these individual (单个的) planets move in an orbit around a star,which is called their parent star. The astronomers estimate that the Beta Pictoris star (绘架座(3 星) has a planet ten times the mass of Earth. It orbits (环绕轨道运行) at a distance of about 10. 5 billion kilometers,more than ten times the distance of the earth from the sun. And Vega (织女星) ,one of the brightest stars in the sky appears to have a planet twice the mass of Jupiter (木星) ,the largest planet in our solar system. This planet is 8 billion kilometers from its parent star. In comparison,our solar system seems almost tiny. The distance between Pluto (冥王星) ,the farthest planet in our solar system and the sun is “just” 5. 9  billion kilometers!

根据短文内容,回答下列问题。

1. With this discovery,how many extra-solar planets are discovered?

2. Is Vega the only one brightest star in the sky?

3. Which planet is the largest in our solar system?

4. Which planet is the farthest planet in the solar system?

阅读提示:本文主要介绍了太阳系的九大行星与母星的关系。

1. 50.细节理解题。由第一段中的第二句“With this discovery,we now know of 50 extra-solar planets,also called exoplanets. ”可知。

2. No,it isn’t.细节理解题。由第二段中的第四句“And Vega (织女星), one of the brightest stars in the sky appears to have a plan-et...”可知。

3. Jupiter.细节理解题。由第二段中的第四句“...the mass of Jupiter (木星 ) , the largest planet in our solar system* ”可知。

4. Pluto.细节理解题。由第二段中的最后一句“The distance between Pluto (冥王星 ) , the farthest planet in our solar system and the sun is ‘just’ 5. 9 billion kilometers! ”可知。

题目来源:2016年启东中学作业本英语阅读理解与完形填空4 > Week 19 Know our world 了解我们的世界

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