Physics, 06.05.2020 20:10 alexchou773pejk7x

Which of the following is a unique feature of the Earth's environment that aerospace engineers needed to imitate on a spacecraft in order to make manned spaceflight possible?

A. The Earth has a strong magnetic field.
B. The Earth has an atmosphere rich in carbon dioxide and hydrogen.
C. The Earth has a strong gravitational field.
D. The Earth has an atmosphere rich in nitrogen and oxygen.

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Which of the following is a unique feature of the Earth's environment that aerospace engineers neede...