Astronauts now ____________: Pilots, the astronauts who actually fly the space shuttle, account for one-third of the astronaut
举一反三
- Astronauts now ____________: Pilots, the astronauts who actually fly the space shuttle, account for one-third of the astronaut corps. Mission specialists run experiments in orbit, work the shuttle's robot arm and go on spacewalks. They're doctors, engineers and scientists and can command stays on the space station. They are the remaining two-thirds of the corps.
- Astronauts are connected to the space shuttle so that they cannot float off into space.
- 8. “It was the first time that US astronauts were sent into space from US soil after a nine-year gap.” No US astronauts have ever been sent into space before.
- Astronauts were ordered to abandon the International Space Station because _______.
- 学起: Space travel is dangerous and the astronauts in space have to ______ many discomforts (不适) in their rockets.