1、本网站免费注册后即可以下载，点击开通VIP会员可无限免费下载！
2、资料一般为word或PPT文档。建议使用IE9以上浏览器或360、谷歌、火狐浏览器浏览本站。
3、有任何下载问题，请联系微信客服。
扫描下方二维码，添加微信客服
外研版（2019）英语选择性必修四《Unit 6 Space and beyond》Period One Starting out & Understanding ideas—Comprehending优质课ppt课件
Unit 6
单
元
主
题
语
境
Throughout the ages,men have groped after the meaning of the universe and their role in it; after all,we all look forward to the day
when the scientists can discover more secrets of the universe.
千百年来，人们一直在探索宇宙的意义以及人类 自身在宇宙中的
作用；毕竟我们都盼望着科学家 们能够发现更多的宇宙奥密的那一天。
人与自然——广袤无垠的外太空
话题导入
Scott Kelly，Mikhail Kornienko Celebrate
Their 171st Day in Space
Astronauts Scott Kelly of NASA and Mikhail Kornienko of Roscosmos arrived at the International Space Station where they would have 171 days to spend1，looking down on us from our planet’s orbit.As planned，their trip is longer than any other astronaut’s so far.
Why make astronauts spend so much time in space?
It might sound like a whole lot of time to spend in space，but the fact is that their mission is far from over.Their one-year trip aboard should help scientists understand what problems might arise during prolonged spaceflight.In addition，several experiments would be carried out at the same time.
For instance，they’ve had their eyes and their vision closely monitored to pin down any potential changes due to increased intracranial pressure，in turn the result of fluid shifts in the upper body because of weightlessness.
Hoping to get a better idea of how the human body transforms in space2，researchers are also comparing Scott Kelly to his twin brother，retired astronaut Mark Kelly.