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China’s Mars rover(火星车) Zhurong, named after the Chinese god of fire, landed safely on Mars on May 15, making China only the second behind the United States to fully succeed.
The 240-kilogram, six-wheeled rover is equipped with six scientific instruments, giving it the appearance of a “blue butterfly”. Unlike Perseverance, the American Mars rover, Zhurong needs sunlight to power itself. Now that Zhurong has got down successfully, it is expected to take the next 90 days to map the area on Mars, monitor(监测) changes in weather such as temperature and search for signs of water ice. Zhurong will therefore help build a more complete geological picture of the red planet’s history.
China has successfully landed on the moon three times, and has even brought back lunar rocks to Earth. But landing on Mars is even more difficult. Mars exploration is known for its high risks and difficulties, as well as the uncertainties in the long-distance interstellar(星际) fight. The landing is the most challenging part of it. Around half of Mars exploration missions(探索任务) failed, and most of them went wrong in the landing process. A Mars landing is often considered as “the seven minutes of terror” because the process is completely autonomous. “The distance was too far away for the spacecraft so it has to do it all on its own,” said Chen Lan, a scientist in China’s space program. “If something went wrong, people on earth have no way to help.”
“Mars is the planet in our solar system that we are most likely to live in the future. That’s why we want to understand it.” Ge said. “The success of Zhurong’s landing will lay the foundation for future Mars missions, including a sample return mission in 2030.”
1．According to the passage, Zhurong Rover looks like ________.A． | B． | C． | D． |
| A．map the Mars | B．study the weather |
| C．change the temperature | D．look for water ice |
| A．self-directed | B．trusted | C．man-controlled | D．prepare |
| A．history | B．process | C．distance | D．challenge |
| A．the American rover is powered like Zhurong |
| B．the mission of Zhurong will last about 3 months |
| C．few Mars exploration missions succeed |
| D．we are possible to move to Mars in 2030 |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
