Why do humans explore space?
举一反三
- 中国大学MOOC: Why do humans explore space?
- Outer space ________________(not explore) by people 50 years ago.
- The central idea conveyed in the passage is that ______. A: although robots can do much dangerous and tiring work, humans are superior B: although humans are superior, robots can do much better in many areas of work C: robots will replace humans in more and more fields D: robots are superior to humans because they can do much work that humans can't do
- When we ask the question Why? ... explore its ______.
- Exploring [u] [/u] space is exciting, yet dangerous. There is [u] [/u] need for both robots and humans for space exploration. A: the; a B: a; a C: /; a D: /; the