A．Because both have a limited supply of air, water, and-找考题网

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A．Because both have a limited supply of air, water, and other resources.
B．Because the Earth moves around the sun as fast as a spaceship.
C．Because we can travel to outer space.
D．Because the Earth never stops moving.

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A．His mother tongue is not English.B．His major is English.C．His major is math.D．His major is football.

A．His mother tongue is not English.
B．His major is English.
C．His major is math.
D．His major is football.

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