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Which of the following technological developments first allowed humans to successfully travel to outer space and back
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Which of the following technological developments first allowed humans to successfully travel to outer space and back

User Yaniv Ofer
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5 votes

Answer:

what are the options

Step-by-step explanation:

i need help on it too

User Arline
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2 votes

Answer:

No options were given however, to my knowledge, the first was the hot air balloon.

User DinosaurHunter
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