Unit 3 Sea Exploration 单元限时小卷-【高中必刷题】2023-2024学年新教材高中英语选择性必修第四册同步课件（人教版2019）

03 单元限时小卷 建议用时：49分钟 1 [湖北荆州中学2022高二期末] In the waves of human exploration into space, our brave Chinese people have never stopped the pace of advancing. In just half a century, China has made remarkable space exploration success. After landing probes on the lunar and Martian surfaces, China has begun to set its exploratory sights on the core of our solar system—the sun. Named Xihe after the sun goddess in ancient Chinese mythology, the 508-kilogramme Chinese H-Alpha Solar Explorer satellite was launched on Oct 14, 2021 from the Taiyuan Satellite Launch Centre in Shanxi Province. It then entered a sun-synchronous orbit about 517 kilometres above Earth. “The spacecraft is China's first space-based solar telescope and is designed to work for at least three years,” Wang Wei, project manager of the satellite, told China Daily. Its scientific payload is an H-Alpha imaging spectrograph （成像光谱仪）. The H-Alpha band is one of the best spectral lines to study solar activity, according to the Global Times. “The instrument is able to observe and record changes in the sun's physical elements like its temperature and speed, facilitating scientists' studies about the dynamics and physics during a solar eruption,” Wang told China Daily. 刷阅读理解 Several Chinese satellites, such as the Fengyun 3E meteorological satellite, have carried equipment that can collect solar data, but Xihe is the first one dedicated to solar observation. “Since solar activity has many effects on life on Earth, it is important for mankind to study the sun,” Zhao Jian, a senior official at the China National Space Administration, told China Daily. Since the 1960s, NASA has sent dozens of solar orbiters to circle the sun, and in 2004, the Genesis spacecraft returned a sample of solar wind. The most recently launched solar mission was Parker Solar Probe in 2018. Europe and Japan also have solar missions, according to the South China Morning Post. “Our country is ranked No.2 in the worl