Unit 7 The unknown world单元话题阅读理解（含答案+解析） -2024-2025学年八年级英语下册单元重难点高频易错题专练（沪教牛津版）

2024-2025学年八年级英语下册单元重难点高频易错题专练（沪教牛津版） Unit 7 The unknown world单元话题阅读理解 一、阅读理解 Why is it called Mars (火星) Well, Mars is the name of the Roman god of war (罗马战神) . People see the planet (星球) as a symbol of war for thousands of years. It is also known as the Red Planet because of its color. It is red because it's rich in iron (铁). Chinese people called it the "fire star" for the same reason. Scientists was interested in the planet. They first saw Mars in the sky more than 4, 000 years ago. Then, people from all over the world studied the planet. About 200 years ago, scientists started to study pieces of Mars. They broke away and drifted (漂流) through space for millions of years before they got to Earth. Scientists have learned some things about Mars. For example, Mars is home to a 21-kilometer-tall mountain—the tallest in our solar system (太阳系) . However, Qomolangma, Earth's highest mountain, is just 9 kilometers tall. Like Earth, Mars has moons. It has two moons named Phobos and Deimos. The Red Planet also has the largest dust storms (沙尘暴) in the solar system. And they can last for months. Earth is 10 times heavier than Mars. So The Red Planet's gravity (重力) is only 37 percent as strong as Earth's, meaning you can jump nearly two times higher on Mars. For the same reason, you are two times heavier on Earth than on Mars. 1．Why does Mars get the name "fire star" A．Because it is red. B．Because it is rich in iron. C．Because it is the symbol of war. 2．When did scientists see Mars for the first time A．Millions of years ago. B．Over 4, 000 years ago. C．More than 200 years ago. 3．What does the underlined word "They" refer to in paragraph 2 A．Scientists. B．Pieces of Mars. C．Stars. 4．We can know _____ about Mars in paragraph 3. A．the color B．the weather C．the size 5．What can we infer (推断)from the last paragraph A．Mars has stronger gravity than Earth. B．People are heavier on Mars than on Earth. C．People can jump higher on Mars than on Earth. 阅读理解 As space science develops, man has learned more and more about space. Space is not only amazing but also dangerous. While working in space, spacemen are facing danger as well as success. Scientists have found out that the radiation (辐射) is the greatest danger to spacemen in space. When spacemen are working in space, they are in danger of the radiation from the sun and other stars, which is bad for their health. The harm of the radiation won't be found until their children even grandchildren are born. Some special medicine may work a little, but no really effective medicine has been found so far. Space rubbish is also thought to be a great danger to spacemen. It's reported that there were 9,000 man-made things flying in space. About 30% of these are satellites, 10% are spaceships, and the rest are space rubbish. An explosion (爆炸) in space in 1999 made a cloud of 300, 000 fragment (碎片), each at least 4mm in size. A small piece of ... ...