2. 职称英语
  3. What is the most important factor for a rocket to escape from the Earth? [br] Ho

What is the most important factor for a rocket to escape from the Earth? [br] Ho

游客2023-10-06  73
问题 What is the most important factor for a rocket to escape from the Earth? [br] How fast will a rocket go to escape completely from the Earth’s gravity? ______
选项 A、Seventy miles per second.
B、Seven thousand miles per hour.
C、Twenty-five thousand miles per second.
D、Twenty-five thousand miles per hour.
答案 D
解析 从文章的第二段最后一句，可以得知逃离地心引力的速度是每秒7英里或者每小时2万5千英里。所以本题的答案应该是D。
转载请注明原文地址:http://tihaiku.com/zcyy/3075562.html
相关试题推荐
随机试题
最新回复(0)