第1个回答 2016-06-17
一、 1. D 2. C 3. A 5. B
二、 1. No one has discovered any life 2. we have already sent them 3. but she has never been 4. I saw him showing the foreignvisitors around
三、1. In 1961. 2. It sent the first space station intospace. 3. A space station. 4. Until the late 1980s. 5. The history of space stations and whatthe life in space stations is like.
四、 1. C 2. B 3. A 4. D 5. B 6. C 7. A 8. C 9. B 10. A
五、Scientists think that there has been life on earth for hundreds ofmillions of years. Seven other planets go around the sun like the earth.However, none of them has an environment like that of the earth. So scientistsdo not think they will find life on them. The sun and its planets are called the solar system. And our solarsystem is a small part of a much larger group of stars and planets. We call itGalaxy. Scientists have also discovered many other galaxies in the universe. Soit is impossible to imagine how large the universe is. We have always asked the question: With somany stars in the universe, are we alone? Is there life out there in the space?We’re looking forward to know the answer.