Question

Our sun is a star. Like all stars, it is a mass of （ 一大团）very hot gases. The sun’s energy doesn’t come from burning fuels（ 燃料 ）. The sun’s energy comes from its nuclear fusion.( 核聚变 )

How big is the sun? Its diameter, the distance across its center, is quiet huge. That’s more than 100 times the diameter of Earth. The sun’s volume is more than a million times the volume of the Earth. Another way to say this is that the sun could hold one million Earths inside it.

The sun has different layers of gases. Each layer mixes into the next, like the layers of Earth’s atmosphere.（ 大气 ） Most of the sun’s mass is in its center. It is also very hot. Almost all fusion takes place in the center.

The sun creates energy in the form of heat and light. Even though the sun is a ball of gases, it is made up of several layers. The main layers are the center. There are also other layers. The sun produces hug energy. Its energy mainly comes from its center. The sun is the source of most of the energy on Earth. Without the sun, there will be no living things on earth, including human beings.

1.What are the gases of the sun like?

A. Very hot

B. Very bright

C. All of the above

2.The sun’s energy comes from        .

A. X—rays

B. nuclear fusion

C. layers of gases

3.The diameter of the earth is about 6300 km. How about that of the sun?

A. About 6300km

B. About 63000km

C. About 630000km

4.What’s the meaning of the underlined word “ volume” according to the passage?

A. 形状                B. 面积                C. 体积

5.What’s the last two paragraphs about?

A. The sun has many layer.

B. Where the sun energy is from.

C. How the sun energy is made.

Answer

1.A

2.B

3.C

4.C

5.B

【解析】

试题分析：这篇文章主要是有关太阳的一些事情，文中提到太阳能量的来源以及太阳的大小等情况。

1.A细节理解题。由第一段第二句可知，太阳是一大团炙热的气体。故选A。

2.

故选B。

3.C细节理解题。由第二段第三句可知，太阳的直径是地球直径的一百倍。所以此题选C。

4.C词义猜测题题。由下一句Another way to say…可推断volume意为"体积"。故选C。

5.

考点：科普类短文阅读