Question

阅读短文，完成各题。

Scientists think that there has been life on the earth for hundreds of millions of years. However, we have not found life on any other planets yet.

The earth is a planet and it goes around the sun, which is a star. Seven other planets also go around the sun. None of them has an environment like that of the earth, so scientists do not think they will find people and things on them. The sun and its planets are called the solar system (太阳系). The solar system is a small part of our galaxy (星系). There are billions of stars in the Galaxy, and our sun is only one of them.

Scientists have also discovered many other galaxies in the universe (宇宙). They are very far away and their light has to travel for many years to reach us. So how large is the universe? It is impossible to imagine.

Scientists have sent spaceships to the planet Mars (火星) to take photos. They have even sent spaceships to travel outside the solar system. However, no spaceship has travelled far enough to reach other stars in our Galaxy.

Scientists have always asked questions: with so many stars in the universe, are we alone, or is there life out there in space? Have there been visitors to the earth from other planets? Why has no one communicated with us? We do not know the answers… yet.

根据短文内容，判断下列句子正误。正确的用“A”表示，不正确的用“B”表示。

1.There are eight planets in the solar system.

2.There is more than one galaxy in the solar system.

3.The light from the stars in other galaxies has to travel for a long time to reach the earth.

4.Spaceships have visited most of the universe.

5. Scientists have received many messages from space.

Answer

1.A

2.B

3.A

4.B

5.B

【解析】

试题分析：科学家认为地球上的生命有数亿年，然而我们还没有在其他行星上发现生命。太阳系中共有八大行星，而太阳系也只是银河系的一小部分。宇宙中还有许多其它的星系。

1.A细节判断题。根据短文中的句子“The earth is a planet and it goes around the sun, which is a star. Seven other planets also go around the sun.”可知，太阳系中共有八大行星。与原文相符，答案为A。

2.B细节判断题。根据文中语句“The solar system is a small part of our galaxy．”理解可知，太阳系是银河系的一小部分。与原文不符，答案为B。

3.A细节判断题。根据文中语句They are very far away and their light has to travel for many years to reach us.可知，其它星系的光旅行了很长时间才到达地球。与原文相符。答案为A。

4.B细节判断题。根据文中语句“However, no spaceship has travelled far enough to reach other stars in our Galaxy.”可知，宇宙飞船最远到达太阳系，与原文不符。答案为B。

5.B细节判断题。根据文中语句“Why has no one communicated with us? We do not know the answers… yet.”可知，答案错误，应选B。

考点：考查科普类短文阅读。