《2024年仁爱英语同步练习册九年级全一册仁爱版》

二、阅读理解。
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 fuel(燃料). The sun’s energy comes from its nuclear fusion(核聚变).
How big is the sun? Its diameter(直径), the distance across its center, is quite huge. That’s more than one hundred times the diameter of the 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(在……内) it.
The sun has different layers(层) 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 huge energy. Its energy mainly comes from its center. The sun is the source of most of the energy on the earth. Without the sun, there will be no living things on the earth, including human beings.
根据短文内容，选择最佳答案。
( )1. What are the gases of the sun like?
A. Burning.
B. Very hot.
C. Very bright.
D. All of the above.
( )2. The sun’s energy comes from ______.
A. nuclear fusion
B. burning fuels
C. X - rays
D. layers of gases
( )3. The diameter of the earth is about 6,300 kilometers. How about that of the sun?
A. About 6,300 kilometers.
B. About 63,000 kilometers.
C. About 630,000 kilometers.
D. About 6,300,000 kilometers.
( )4. What’s the meaning of the underlined word “volume” according to the passage?
A. 形状
B. 广度
C. 面积
D. 体积
( )5. What are the last two paragraphs about?
A. The sun has many layers.
B. Where the sun energy is from.
C. How the sun energy is made.
D. The sun is the source of the energy on Earth.

答案： 1. B　由第一段第二句可知，太阳是一大团炙热的气体。
2. A　由第一段最后一句可知，太阳的能量来自自身的核聚变。
3. C　由第二段第三句可知，太阳的直径是地球直径的一百多倍。
4. D　由下一句“Another way to say...”可推断，volume意为“体积”。
5. B　最后两段主要讲述太阳能量来自哪儿。

三、阅读表达。
The planet Jupiter(木星), named after the king of the Roman gods, is the fifth planet out from the Sun. Jupiter is two and a half times as large as all the other planets in the solar system combined. It is made mainly of gases and so is known as a “gas giant”.
Jupiter is one of five planets that can be seen by eyes from the Earth. It is the second brightest planet in the solar system. Jupiter has the shortest day of all the planets. It takes the planet every 9 hours and 55 minutes to turn on its axis(轴) once. Jupiter goes around the Sun once every 11.8 Earth years.
Jupiter has special cloud features. The high atmosphere(大气) of Jupiter is divided into cloud belts and zones. The Great Red Spot is a huge storm on Jupiter. Jupiter’s atmosphere is special because it is the solar system’s largest atmosphere. It is mostly made up of hydrogen(氢气) and helium(氦气). It would be impossible for humans to breathe in the air. So, if you are thinking of traveling to this planet to do some research, you would have to wear a breathing suit.
根据短文内容，回答下列问题。
1. How long does it take Jupiter to turn around its axis once?
________________________
2. Why is Jupiter known as a “gas giant”?
________________________
3. If you want to visit the Jupiter, what should you wear?
________________________
4. What’s the main idea of paragraph 3?
________________________
5. What’s the Chinese meaning of the underlined sentence?
________________________

答案： 1. It takes Jupiter 9 hours and 55 minutes.
2. Because it's made mainly of gases.
3. I should wear a breathing suit.
4. Jupiter has special cloud features.
5. 对人类而言，在木星上呼吸空气是不可能的。