Unit 4 Space Exploration 话题作业单（阅读理解和语法填空）-2022-2023学年高一英语人教版（2019）必修第三册

高一英语Book3 Unit4 Space Exploration话题 阅读理解（说明文）+语法填空 （含详解） 班级： 姓名： 分数： 1． 阅读理解（每题2.5分，共15分） A In September 1966, NASA launched its second Surveyor spacecraft to study the surface of the moon. Surveyor 2 was carried to space by a Centaur stage rocket. Unfortunately, it crash-landed on the lunar surface, but that's not the end of Surveyor 2's story. The upper stage of its Centaur rocket has spent decades floating around the solar system. This week, astronomers confirmed that the upper stage of the Centaur rocket has returned to Earth for a brief visit. Researchers guessed that a strange-looking object was a piece of human-made space debris (碎片) when they first saw it in September. But some serious work was required to confirm its identity. Scientists around the world have been studying the booster (助推器) since September, when the then-unidentified object received the name 2020 SO. By observing how light reflects off 2020 SO and comparing those observations to space debris of a similar age and material, scientists were able to confirm the object's identity. The 1966 Centaur's upper stage re-entered Earth's orbit in November and astronomers got the best look at the rocket booster on December 1, when it made its closest pass to Earth. The rocket booster caught astronomers' attention because its orbit is very similar to Earth's, but it was moving much slower than most asteroids (小行星). Paul Chodas, from NASA, studied 2020 SO's orbit to find out where the object came from and he believed it came from Earth around September 1966, when Surveyor 2 launched. “There's very little ambiguity (模棱两可),” says University of Arizona planetary scientist Vishnu Reddy to The New York Times. It was a perfect match, “the final apples to apples comparison.” 1. What does the underlined word “it” in paragraph 1 refer to? A. A brief visit. B. The solar system. C. The Surveyor spacecraft. D. A part of a long-lost rocket. 2. How do the scientists identify the floating object? A. B