单项选择题

What causes tide

A．The pull of the sun and the moon.
B．The heat of the sun.
C．The shape of the moon.
D．The light of the moon.
<上一题 目录 下一题>
热门 试题

单项选择题
The water level of the oceans rises and falls ______.
A．often
B．often in a year
C．twice
D．twice a day
单项选择题
The water level of an ocean falls ______.
A．when there is a low tide
B．when the water is pulled away from the earth
C．when the moon disappears over the horizon
D．when water no longer moves
相关试题