But could time travel actually be possible?Some scientists say yes,in theory.They propose using cracks in time and space called “wormholes”,which could be used as shortcuts to other periods.Einstein’s theory of relativity allows time travel in extreme circumstances.And British physicist Stephen Hawking says you could travel into the future with a really fast spaceship—going at nearly the speed of light.Though building such a spaceship would of course be no simple task.
Even if you could travel into the past,there is something called the “grandfather paradox”.It asks what would happen if a time traveler were to go back in time and have his own grandfather killed for some reason,and therefore prevent himself from being born.If the time traveler wasn’t born,how would he travel back in time?
And would you really like to visit the future?In H.G.Wells’ book,the main character travels into distant time where he arrives at a beach and is attacked by giant crabs.He then voyages 30 million years into the future where the only living thing is a black object with tentacles(触角).
If that’s what’s in store,maybe we are better just living in the present day after all.
(2016·北京海淀区期中考试)
1.The novel The Time Machine mentioned in Paragraph 2 aims to show .
A.people’s interest in time travel
B.the special feature of the book
【2017届高考英语一轮复习知识梳理练习:选修7 Unit 21 Human Biology(北师大版)】相关文章:
★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (43)
★ 【三维设计】2017版(江苏专用)二轮复习练习:必修2 Unit 2《Wish you were here》单元检测(含解析)
★ 2017高考四川省广安市英语阅读理解一轮系列训练:11(含解析)
★ 【人教版】2014届高考英语一轮复习指导考点针对练:必修2 unit2《The Olympic Games》
★ 【北师大版】2014届高考英语一轮复习指导课时作业:Unit 8 A卷 Word版含解析
★ 【北师大版】2014届高考英语一轮复习指导课时作业:Unit 8 B卷 Word版含解析
★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (24)
★ 【北京专用】2014届高考英语一轮复习方案课时作业:必修5 Unit 4 Making the news
★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五:创新押题(含解析)
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21