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 用方框内单词的适当形式填空。

telescope, spacesuit, electronic, control, mainly

1. People can see the sky more clearly with the help of the        .

2. Scientists use computers          the speed and direction of the robots.

3. There are too many          things. They are so magical.

4. Astronauts must wear          before they go into the spaceship.

5. The spaceships are        used to search for more information about other planets.

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