题目内容
Many stars are so far away from us that we can't see them．
A．离开
B．遥远
C．走远了
手拉手全优练考卷系列答案Scientists think that there has been life for__31_ of years. However we haven’t found life on other planets _32_ . The earth is a planet and it _33__ around the sun. Seven other planets also go _34_ the sun. The sun and its planets are __35 the solar system. The solar system is a small part of our galaxy.
Scientists __36_ lots of spacecraft to look at other planets in the solar system, and some spacecraft have gone __37_ the solar system. However, no one __38_ any life in space yet.
But why has no one from other planets sent us a message ? Have they tried to send _39_ to us ? _40_so many stars in the universe, are we alone, or is there life out there in space ? We don’t know.
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How many things can you see in the night sky? A lot! On a clear night you can see the moon, some planets, and thousands of sparking stars.
You can see even more with a telescope. You might see that many stars look larger than others. You might see that some stars that look white are really red or blue. With bigger and bigger telescopes you can see more and more objects in the sky. And you can see those objects in more and more detail.
But scientists believe there are some things in the sky that we will never see. We won’t see them with the biggest telescope in the world, on the clearest night of the year.That’s because they’re invisible. They’re the mysterious dead stars called black holes.
You might find it hard to imagine that stars die. After all, our sun is a star. Year after year we see it up in the sky, burning brightly and giving us heat and light. The Sun certainly doesn’t seem to be getting old or weak. But stars do burn out and die after billions of years.
As a star’s gases burn, they give off light and heat. But when the gases run out, the star stops burning and begins to die.
So next time you look up at the night sky, remember: there’s more in the sky than we can see!
【小题1】On a clear night we might see things except______.
| A．the moon | B．some planets | C．sparkling stars | D．the sun |
| A．By using a telescope |
| B．By using a microscope |
| C．By climbing up to the top of a mountain |
| D．By going outside on a clear night. |
| A．看不见的 | B．听不见的 | C．摸不着的 | D．无形的 |
| A．burn | B．run out | C．give off heat | D．get weak |
| A．We might see that many stars look larger than others with a telescope |
| B．We might see that some stars that look white are really red and blue with a telescope. |
| C．We can see some objects in more and more detail with bigger and bigger telescopes. |
| D．The sun certainly seems to be getting old and weak. |
Scientists think that there has been life for__31_ of years. However we haven’t found life on other planets _32_ . The earth is a planet and it _33__ around the sun. Seven other planets also go _34_ the sun. The sun and its planets are __35 the solar system. The solar system is a small part of our galaxy.
Scientists __36_ lots of spacecraft to look at other planets in the solar system, and some spacecraft have gone __37_ the solar system. However, no one __38_ any life in space yet.
But why has no one from other planets sent us a message ? Have they tried to send _39_ to us ? _40_so many stars in the universe, are we alone, or is there life out there in space ? We don’t know.
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