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Scientists have discovered the first Ear...

Scientists have discovered the first Earth-sized planet. It was first marked by scientists’ using NASA’s Kepler telescope(望远镜), so it’s called Kepler-186f. It lies about 500 light years from Earth and goes around its star. The planet is the right distance from its star for water: not too close or not too far. Water is one important condition that scientists guess is necessary for life. So it could have water and possible life. It’s called a true Earth cousin.

“This planet is an Earth cousin, not an Earth twin, ”said Barclay, who is among a team of scientists reporting on the discovery in the magazine Science this week.

“It’s very exciting to find a planet similar to the Earth, ”Barclay said. “It’s not easy work because things change as we get more measurements.”

Scientists don’t know anything about the air of Kepler-186f, but it will be a task for future telescopes which can study for chemicals that have something to do with life.

“It’s possible for life to live in this planet, but that doesn’t mean there is life in it,”Barclay said.

So far, scientists have found nearly 1, 800 planets in the universe.

“The past year has seen a lot of progress in the search for Earth-like planets. Kepler-186f is very important because it is the first planet that is the same temperature and is almost the same size as Earth, ”scientist David Charbonneau wrote in an email.

1.Scientists have already found about       planets now

A. 500    B. 186    C. 1,800

2.The planet is the      distance from its star for water: not too close or not too far.

A. far    B. right    C. close

3.Which of the following about Kepler-186f is NOT true according to the passage?

A. It could have water and possible life, so perhaps we might live there.

B. It’s almost as hot as and as large as Earth.

C. It’s an Earth-like planet.

4.We can probably read this article in       .

A. a story book    B. a newspaper    C. a text book

5.What is the best title of the passage?

A. Space research.    B. Journey to space.    C. Scientists discover the most Earth-like planet.

 

1.C 2.B 3.A 4.B 5.C 【解析】这是一篇科学报道。科学家首次发现了一颗与地球大小一样的行星-Kepler-186f。这颗行星距离地球大约500光年,上面可能有水和生命的迹象,它有着与地球相同的温度,被称为真正的地球表亲。 1.细节理解题。根据短文中的句子“So far, scientists have found nearly 1, 800 planets in the universe.”可知,到目前为止,科学家已经在宇宙中发现了近1, 800颗行星。故答案为C。 2.细节理解题。根据短文中的句子“The planet is the right distance from its star for water: not too close or not too far.”可知,答案为B。 3.细节判断题。根据文中句子 “It’s possible for life to live in this planet, but that doesn’t mean there is life in it” 生活在这个星球上是可能的,但这并不意味着这个星球上有生命存在,故答案错误。根据Kepler-186f is very important because it is the first planet that is the same temperature and is almost the same size as Earth可知,Kepler-186f是第一颗与地球具有相同温度并和地球差不多大小,故B正确;根据句子“It’s very exciting to find a planet similar to the Earth”可知,Kepler-186f是一颗与地球相似的行星,故C答案正确。 4.推理判断题。文章主要介绍了科学家首次发现的第一颗与地球大小相似的行星-Kepler-186f的相关情况,故文章可能出自报纸,答案为B。 5.标题归纳题。短文开头的句子“Scientists have discovered the first Earth-sized planet.”是文章的主题句,整篇文章都是围绕这颗行星展开。A. Space research. 太空研究;B. Journey to space.太空旅;C. Scientists discover the most Earth-like planet.科学家发现最像地球的行星。故答案C最切题。
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