单项选择题

The ancient people believed that ______.

A．the earth was spinning on the axis of the sky
B．the sky was a hollow sphere spinning around the earth
C．the patterns of stars on the sky would never change
D．the stars around the sky were not stationary

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热门试题

单项选择题

Which of the following is true about the motion of the moon

A．The moon and the sun are moving in the same plane.
B．The moon revolved along the ecliptic.
C．The moon moves faster than the sun.
D．The position of the moon can be found changed in an hour's time.

单项选择题

The writer says that travel was important in the past because it ______.

A．was a way of spreading ideas
B．broke down political barriers
C．led to economic progress
D．made new ideas less schooling