题型:阅读理解 题类:模拟题 难易度:普通
安徽省蚌埠市2021届高三英语第三次教学质量检查考试(三模)试卷
The American space agency's Mars explorer, Perseverance, landed successfully on the Red Planet Thursday after a seven-month trip. The six-wheeled explorer, or rover, is on a NASA mission to collect Martian soil and rocks as part of the search for signs of ancient life. It took 11-and - one -half minutes for the confirmation signal to reach Earth. Moments later, controllers received the rover's first pictures of Mars.
Perseverance landed in an area of Mars called Jezero Crater, which contains a large ancient lakebed. NASA considers the area a promising place to find possible signs of microbial life (微生物). Scientists believe if life ever existed on Mars, it would have been present 3 to 4 billion years ago, when water flowed on the planet. However, rough ground around Jezero Crater presented possible landing dangers for the Perseverance spacecraft.
Perseverance is NASA's fifth rover to explore Mars. The first, named Sojourner, was sent in 1997. Then came Spirit and Opportunity, which landed in 2004. The fourth rover, Curiosity, has been exploring the planet since 2012. Those missions all resulted in valuable information about the Red Planet. NASA says Perseverance "aims to take the next step" in searching for signs of ancient microbial life.
It is NASA's largest, heaviest and most technology - loaded vehicle ever sent to Mars. It has 19 cameras, two microphones and a two- meter- long robotic arm. A machine connected to the arm will dig into the ground to gather rock and soil. The rover is equipped with X-ray and imaging systems to study Martian chemistry and to identify possible organic compounds (化合物). Perseverance is also carrying a small experimental flyer called Ingenuity. NASA says the 1. 8 kilogram vehicle will attempt its first flight in the coming months. NASA officials hope it will be the first vehicle to fly on a planet other than Earth.
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