The article presents information on a space shuttle system to be built under the U.S. space program. The new space vehicles would return intact to earth after their mission, and will be launched again. These vehicles would provide the...
根据原文,人类梦想去火星探险,但是“confronted with the cost…presidents…have flinched and resorted to halfway measures like the shuttle”即“面临经费问题,美国总统们畏缩了,不得不做出妥协,先发展航天飞机”。由此可见,发展航天飞机只是人类去火星探险梦想的妥协。只有选项c符合这种判断,因此该项的说法是正确的...
Since the shuttle was retired in 2011, a variety of unmanned launch vehicles have taken its place for satellite launches, while Russian Soyuz spacecraft take crews to and from the ISS. NASA is currently investigating other possible long-term replacements for manned spaceflights. ...
aEmphasizing the English language’s impact by its commercial activities across the globe, the United States has brought facets of its culture to almost every country. 强调英文冲击由它的商业行为横跨地球,美国给几乎每个国家带来了它的文化小平面。 [translate] aThe pre-control valve block was changed ...
Why is the spaceflight of the seven crew members of the space shuttle Discovery called one of the biggest risk of their lives如何将EXCEL生成题库手机刷题 如何制作自己的在线小题库 > 手机使用 分享 反馈 收藏 举报 参考答案: null 复制 纠错
The Space Shuttle was the first reusable spacecraft. It promised to make space travel routine, affordable and to put hundreds of tons of material into orbit every year. By the 1980s, the Shuttle program was at full steam. Then, quite suddenly, another shuttle appeared and its name was the...
Why is the spaceflight of the seven crew members of the space shuttle Discovery called one of the biggest risk of their lives如何将EXCEL生成题库手机刷题 如何制作自己的在线小题库 > 手机使用 分享 反馈 收藏 举报 参考答案: 欢迎编辑补充
It always made me scared, and I was very nervous and unsure of myself. One time, a teacher touched my head and said, smiling, "Don't worry﹣you'll have a good time with us in this classroom." I still remember my teacher's words....
aA boeing747 was halfway across the Atlantic when the captain got on the 扬声器 boeing747是 半路 横跨大西洋 当上尉 得到在扬声器[translate] aOverhead Equipment (Ref 4 & 6): 顶上的设备 (Ref 4 & 6) :[translate] aWe were sing "happy birthday to you 我们是唱歌“生日快乐[translate] ...
MALE PROFESSOR: Well, the science fiction writer Arthur C. Clarke talked about building a space elevator back in the 1970s.And when someone asked him when he thought this idea might become a reality, his reply was, "Probably about fifty years after everybody quits laughing."...