The Sun's Family The earth is not the only body that travels around the sun. With it are eight other planets, fellow members of the sun's family. Two of them are nearer while the other six are farther 题目和参考答案——青夏教育精英家教网—

题目内容

The Sun's Family

　　The earth is not the only body that travels around the sun. With it are eight other planets(行星), fellow members of the sun's family.

　　Two of them are nearer while the other six are farther from the sun than the earth is. The farther they are, the longer trips they make around the sun. People noticed long ago that these made travelling bodies move around in the sky in definite(一定的) paths.

　　We know that every little bit of matter in the universe pulls upon every other bit of matter. There exists(存在) a pull between the earth and the moon, which keeps the moon travelling in its orbit(轨道) around our planet, the earth. The gravity(重力) holds you to its surface, and pulls back to it the ball which you throw into the air. Of course the ball also pulls on the larger earth, but the earth is so much larger that the pull is not noticed.

　　Now remember that large bodies exert (施加) a greater pull on any body than smaller ones which contain(含有) less material (原料，材料). But each object in the universe, no matter how small, pulls on all other objects to some degree(某种程度).

1．According to the passage, there are ________ fellow members besides the earth in the sun's family.

[　　]

A．eight other

B．seven other

C．nine other

D．over ten other

2．Which of the following statements is TRUE?

[　　]

A．The earth is farther from the sun than any of the other eight planets.

B．Two of the planets are farther from the sun than the earth.

C．Six of the planets are closer to the sun than the earth.

D．The earth is the third nearest planet to the sun.

3．What holds the nine planets in their paths?

[　　]

A．The sun's energy(能量).

B．The earth.

C．The universe.

D．Gravity.

4．Why the moon travels around the earth is ________ .

[　　]

A．that the sun pulls upon the moon

B．that the earth pulls upon the moon

C．that the earth and the moon pull upon each other

D．that the other eight planets pull upon the moon

5．In the last paragraph the writer tell us ________ .

[　　]

A．each object in the universe pulls upon all the others more or less

B．a large body pulls on a small one less than a small body pulls on a large one

C．a small body does not pull on a large one

D．the pull between two bodies is always equal(相等)

答案：A;D;D;C;A

练习册系列答案

Many people say that they have seen flying saucers（飞碟）in the sky.   31  can these things be ?
Some people think that they are spaceships from other planets. Doctors   32  that perhaps they are only a weakness of the eyes. It is possible that they are our own planes   33  very high. Or are they birds with the sun’s light on them?
But some people say that they have seen them   34 . They have seen beings（人）get off them and walk around. They have   35   to those beings, sometimes in English. People have   36   photos of flying saucers and of these beings. We have seen the photos, but sometimes the people had to take them in a   37 . Children have seen flying saucers, and even dogs have seen them. Perhaps we do not think that the   38  of children, or dogs are important. But school-teachers have   39  seen them and Air Force officers and   40  policemen. Must we not listen to these people?
【小题1】

单词拼写
【小题1】We are having fish for d___________ tonight.
【小题2】He was born in Shanghai, but he considers Hangzhou his home t___________ since he has lived here most of his life.
【小题3】There are t___________ days in April as well as in June and in September.
【小题4】【小题5】The dentist says we should b___________ our teeth at least twice a day.
【小题6】Without any help, his father managed to repair the car all by h___________.
【小题7】If the sun s___________ brightly, the weather is usually warm.
【小题8】No. 2 Middle School is a p___________ school, not a private(私立的) one.
【小题9】The thief s___________ food from the supermarket and was caught by the policemen.
【小题10】I came to the city two years ago. I’ve worked here for n___________ two years.
【小题11】According to a r___________ in the newspaper, the basketball star was seriously injured.

All living things on the earth need other living things to live with. Nothing lives 1 . Sometimes one living thing kills 2 . Each kind of life eats another kind of life 3 live, and together they form a food chain(食物链). Some food chains are simple, while others are not. But 4 food chains begin with the sun, and all food chains become 5 if one of the links disappears.

All life needs sunlight to live on. But only plants can use 6 directly(直接地). They make food from sunlight, water, air and so on. Animals can only use the sun’s energy 7 it has been changed into food by plants. Some animals feed directly on plants. Others eat smaller animals. Meat-eating animals are only 8 plants indirectly.

What about human beings? We are members of many food chains. We eat wheat, rice, vegetables, fruits and so on. We also eat meat and drink milk. But 9 often break up the food chains. They kill wild animals. They also make rivers, lakes and seas dirty. When these rivers, lakes and seas are polluted, the fish in them 10 be eaten. If people eat the fish, they will get strange diseases.

Each form of life is linked to all the others. Breaking the links puts all life in danger.

1. A．alone B．lonely C．together D．happily

2. A．other B．the other C．another D．the others

3. A．for B．so that C．and D．in order to

4. A．any B．all C．some D．most

5. A．better B．broken C．stronger D．nicer

6. A．moonlight B．laser light C．sunlight D．bright light

7. A．after B．before C．until D．by the time

8. A．making B．catching C．eating D．feeding

9. A．sunlight B．animals C．plants D．people

10. A．can B．cannot C．must D．needn’t

Many people say that they have seen flying saucers（飞碟）in the sky. 31 can these things be ?

Some people think that they are spaceships from other planets. Doctors 32 that perhaps they are only a weakness of the eyes. It is possible that they are our own planes 33 very high. Or are they birds with the sun’s light on them?

But some people say that they have seen them 34 . They have seen beings（人）get off them and walk around. They have 35 to those beings, sometimes in English. People have 36 photos of flying saucers and of these beings. We have seen the photos, but sometimes the people had to take them in a 37 . Children have seen flying saucers, and even dogs have seen them. Perhaps we do not think that the 38 of children, or dogs are important. But school-teachers have 39 seen them and Air Force officers and 40 policemen. Must we not listen to these people?

1.A. How B. What C. Which D. Where

2.A. say B. prove C. know D. understand

3.A. rising B. flying C. risen D. flown

4.A. fly B. turn C. land D. move

5.A. flown B. gone C. come D. spoken

6.A. received B. bought C. taken D. sent

7.A. horse B. hurry C. colour D. way

8.A. opinions B. discussions C. suggestions D. needs

9.A. often B. hardly C. also D. still

10.A. yet B. even C. so D. then

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