The moon by man already. [ ] A．has been visited B．has been found C．will be reached D．will be seen 题目和参考答案——青夏教育精英家教网—

题目内容

The moon ________ by man already.

[　　]

A．has been visited	B．has been found
C．will be reached	D．will be seen

答案：A

练习册系列答案

快乐寒假北京教育出版社系列答案

假期乐园寒假北京教育出版社系列答案

寒假作业与生活陕西师范大学出版总社系列答案

相关题目

Skin-diving(潜水) is a new sport today. This sport takes you to a wonderful new world. It’s like a visit to the moon! When you’re under the water, it’s easy for you to climb big rocks(岩石) because you aren’t heavy any more.

Everything is blue and green under the water. During the day, there’s enough light（光）. When fish swim nearby, you can catch them with your hands.

When you have tanks of air(氧气罐) on your back, you can stay in deep water for a long time. But you must be careful, when you dive in deep water.

It’s the most interesting part of this sport to catch fish. There are most uses for skin-diving, too. You can clean ships without taking them out of the water. You can get many things from the deep sea.

Now you see that skin-diving is both useful and interesting.

1. Skin-diving can take you to ___________.

A. the moon B. be in danger C. mountains D. the deep sea

2.You can climb big rocks under water because _________.

A. you are stronger B. the fish nearby help you

C. you aren’t as heavy as on the land(陆地) D. there is a lot of light

3. Under water, a skin-diver _________ in the day-time.

A. can see anything clearly B. can’t see anything clearly

C. can see nothing D. can see only fishes

4.With a tank of air on your back, you can _________.

A. catch fish very easily B. stay under water for a long time

C. be in safe place D. have more fun

5. Which of the following is NOT true?

A. Skin-diving is a new sport

B. Skin-diving is like visiting the moon

C. The only use of skin-diving is to have more fun.

D. Skin-diving is both interesting and useful

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!

1.On a clear night we might see things except______.

A．the moon B．some planets C．sparkling stars D．the sun

2.How can we see even more in the sky?

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.

3.What does the underlined word”invisible”mean in Chinese?

A．看不见的 B．听不见的 C．摸不着的 D．无形的

4.When a star’s gases_______,the star begins to die.

A．burn B．run out C．give off heat D．get weak

5.Which of the following is NOT TRUE according to the passage?

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.

Our nearest neighbor is the moon. In the sky, the moon and the sun seem to be of the same size because the moon is much nearer.

The moon makes the tides—the changes in the level of the sea. The moon and the sun together pull the sea. In some parts of the world, the difference between * high tide' (when the sea is very near to the land) and ' low tide' (when the sea is far away from the land) is very big. This is very important for ships.

The moon is very different from the Earth. Gravity on the moon is six times weaker than that on the Earth. There isn't any air. During the day, it is very, very hot but at night it is very, very cold. Nothing can live on the moon.

If the moon goes between the Earth and the sun, we have an eclipse of the sun(日食) . The moon stops the light from the sun and we have night in the day.

If the Earth goes between the moon and the sun, we have an eclipse of the moon. The moon goes into the shadow( 影子) of the Earth and it disappears for a few minutes.

1. The sun to the Earth is _________times farther than the moon to the Earth.

A. nearly 200 B. less than 300 C. nearly 400 D. more than 400

2.When the moon goes between the Earth and the sun, we have night in the day, we call it the eclipse of

A. the moon B. the sun C. the stars D. the Earth

3. Which of the following happens when we have an eclipse of the moon?

A. The Earth goes between the moon and the sun.

B. The moon goes into the shadow of the sun.

C. The moon goes into the shadow of its own.

D. The sun disappears for a few minutes.

4.Which of the following statements are TRUE?

a. The moon and the sun are of the same size.

b. Gravity on the Earth is 6 times stronger than that on the moon.

c. The changes in the level of the sea are called tides.

d. The moon itself pulls the sea and makes the tides.

e. When the sea is near to the land, a high tide may happen.

f. It is much hotter in the day but much colder at night on the moon.

A. a. b. c. f. B. b. c. d. e C. a. d. e. f D. b. c. e. f

Our nearest neighbor is the moon. In the sky, the moon and the sun seem to be of the same size because the moon is much nearer.

If the moon goes between the Earth and the sun, we have an eclipse of the sun(日食) . The moon stops the light from the sun and we have night in the day.

If the Earth goes between the moon and the sun, we have an eclipse of the moon. The moon goes into the shadow( 影子) of the Earth and it disappears for a few minutes.

1. The sun to the Earth is _________times farther than the moon to the Earth.

A. nearly 200 B. less than 300 C. nearly 400 D. more than 400

2.When the moon goes between the Earth and the sun, we have night in the day, we call it the eclipse of

A. the moon B. the sun C. the stars D. the Earth

3. Which of the following happens when we have an eclipse of the moon?

A. The Earth goes between the moon and the sun.

B. The moon goes into the shadow of the sun.

C. The moon goes into the shadow of its own.

D. The sun disappears for a few minutes.

4.Which of the following statements are TRUE?

a. The moon and the sun are of the same size.

b. Gravity on the Earth is 6 times stronger than that on the moon.

c. The changes in the level of the sea are called tides.

d. The moon itself pulls the sea and makes the tides.

e. When the sea is near to the land, a high tide may happen.

f. It is much hotter in the day but much colder at night on the moon.

A. a. b. c. f. B. b. c. d. e C. a. d. e. f D. b. c. e. f

The earth moves round the sun ,and the moon goes round the earth .When our part（部分）of the earth turns to the sun ,it is day ,When our part of the earth turns away from the sun ,it is night. The sun is much bigger than the moon .But sometimes the moon looks bigger than the sun, because it's much nearer to the earth. The sun is very bright .It gives a very strong light .The moon looks quite bright, too .But it doesn't give any light at all. The moon looks much bigger and brighter than the stars .But actually（事实上）, the stars are much bigger and brighter than the moon .They look smaller than the moon because they're much farther away from us.

1.Sometimes the moon looks bigger than the sun, because______.

A．it is much bigger than the sun

B．it comes out only at night

C．it is much nearer to the earth than the sun

D．it doesn't give a very strong light

2.The stars ______.

A．look much bigger than the sun

B．look much brighter than the moon

C．are a lot brighter than the moon, but they are not bigger than the moon

D．are much farther away from us than the moon

3.When it is day, _______.

A．our part of the earth turns to（转到）the moon

B．the sun looks much smaller than the stars

C．we can't see any stars in the sky.

D．the moon turns away from the sun

试题分类