1. 人对抗荒野时期(early frontier):这一时期主要指17世纪至19世纪中叶,拓荒者面对原始荒野环境时形成的个人主义精神,典型表现为独立开拓、自给自足的生活方式。2. 人对抗人时期(1860s-1890s):这一阶段对应边疆开发的后期,随着《宅地法》颁布和铁路建设,出现土地争夺、牧场纠纷等社会冲突,形成诸如牧场主与农场主...
⑤. Paragraph 5 briefly mentions the plans of Europe, the US, and China to further explore planets like Mars and Jupiter, with the hope of understanding the universe’s origins and ensuring future survival. 2. The title “Space: The Final Frontier” means to me that space represents the ul...
Frontiers do not lose their meaning in this network society characterized by openness, dynamism, and constant interaction between individuals, but their construction is being modified. Because there idoi:10.1007/978-3-319-40304-5_3Mirela MrcuSpringer International Publishing...
The next thing I’ve been blown away by (no pun intended) in this first week of the new year isSAS Rogue Heroes, again about real people. I’m not usually a fan of action films and dramas but this one is quite exceptional. We watched the first season a couple of years ago and the...
The push for a dedicated branch of the armed services devoted to the final frontier gained steam as orbital space became increasingly crowded and contested. As the United States' critical infrastructure became increasingly dependent onsatellitesfor communication, navigation, meteorology and intelligence, th...
help us survive well into the future.Step 1 Fast Reading1. What is the passage mainly about?A. What the final frontier is.B. The secrets of the universe.C. The development of space exploration.D. Chinese contributions to space exploration.2. Match the main idea of each paragraph.① ...
Passage 15SPACE:THE FINAL FRONTIER“Are we alone? What's out there?” 1. Looking(look) up at the stars, people have always wanted to learn more about space, and scientists work hard to find answers. They make 2. vehicles (vehicle) to carry brave people into space to find out the sec...
The lock was secure A secure foundation A secure hold on her wrist Secure Able to withstand attack; An impregnable fortress Fortifications that made the frontier inviolable Secure Financially sound; A good investment A secure investment Common Curiosities Is it possible for a system to be secure bu...
The lock was secure A secure foundation A secure hold on her wrist Secure Able to withstand attack; An impregnable fortress Fortifications that made the frontier inviolable Secure Financially sound; A good investment A secure investment Common Curiosities How can one enhance the security of a system...
The efficient frontier graphically represents portfolios that maximize returns for the risk assumed.Returns are dependent on the investment combinations that make up the portfolio. A security's standard deviation is synonymous with risk. Ideally, an investor seeks to fill a portfolio with securities off...