一、 根据短文内容及首字母提示写出所缺单词，使短文意思完整，每空一词
ⓘ建议用时:9 min ⓿正确率: /10
(原创)A new study discovers that the microgravity in spaceflights causes the human brain to shift upward and backward inside the skull. Astronauts who stay longer in space 1. e far greater changes in the brain. The research studied pre- and post-flight brain MRI scans from 26 astronauts with space stays 2. r from a few weeks to over a year. 3. U (先前的) studies focusing on whole-brain averages, which can hide critical regional effects, this study 4. d the brain into over 100 regions to precisely track individual shifts. This approach uncovered previously 5. h patterns: the upper brain regions of astronauts on year-long ISS missions moved upward by over 2mm, while motor and sensory areas showed the largest shifts. Brain structures on both sides moved toward the midline, a pattern that is canceled out in whole-brain 6. m. Most shifts and deformations 7. g return to normal within six months after the astronauts return to Earth. However, backward shifts 8. r poorly because Earth's gravity only pulls downward, not forward. These findings are increasingly important as global space agencies plan longer space missions and space travel becomes 9. a to the general public. This research helps scientists assess spaceflight risks and build a solid 10. f for effective protective measures to secure future space travel.

【语篇解读】本文是一篇科普说明文。文章介绍了一项最新航天医学研究:太空微重力会导致人脑在颅骨内向上向后移位。文章详解了研究方法、核心发现及不同脑区的恢复差异,阐述了该研究对未来长时程太空任务和大众太空旅行的重要意义。
1. experience 2. ranging 3. Unlike 4. divided 5. hidden
6. measurement 7. gradually 8. recover
9. accessible/available 10. foundation

二、 根据短文内容及首字母提示写出所缺单词，使短文意思完整，每空一词
ⓘ建议用时:9 min ✔正确率: /10
(原创)Where exactly is the edge of the Milky Way? This question is far more 1. c to answer than most of us might expect. Since we lie inside the galaxy itself, we can hardly judge its exact outer edge from our inner 2. p. What makes it even harder is to give a clear 3. d of the "edge": the galaxy's density decreases 4. s with increasing distance from the galactic center, with no sharp, clear-cut line to mark 5. w it truly ends. A new study by researchers from the University of Malta provides a scientific 6. e for this long-standing puzzle. They define the galaxy's edge as the end of its star-forming region, and precisely prove this edge lies between 11.28 and 12.15 kiloparsecs from the galactic center. To find this hidden edge, the team 7. a the ages of over 100,000 giant stars. They discovered that the 8. r between stars' ages and their distances from the galactic center forms a perfect U-shaped curve: stars are older near the galactic center, grow progressively younger with increasing distance out to a critical point, then start getting older again beyond that threshold. That critical point is 9. e the galaxy's edge. Stars beyond this edge are migrant ones, pushed out over billions of years by gravitational 10. f.

【语篇解读】本文是一篇说明文。文章围绕"银河系的边缘在哪里"这一难题展开,解释了问题难解的核心原因,介绍了马耳他大学研究团队通过分析恒星数据精准界定银河系边缘的最新科研成果。
1. challenging/complex 2. position 3. definition 4. steadily
5. where 6. explanation 7. analysed/analyzed 8. relationship
9. exactly 10. forces