Astronauts are connected to the space shuttle so that they cannot float off into space.
举一反三
- Astronauts now ____________: Pilots, the astronauts who actually fly the space shuttle, account for one-third of the astronaut
- 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.
- Generally speaking, there are four categories of space. They are intimate space, personal space, _______ space, and public space.
- 学起: Space travel is dangerous and the astronauts in space have to ______ many discomforts (不适) in their rockets.
- Chronobiology complexity set scheduled sponsored regular dieting synchronization12. The space shuttle had been __________ to blast off at 04:38.