摘要: The earth moves round the sun,and the moon moves round the earth.When our part of the earth turns to the sun,it is day. When our part of the earth turns away from the sun,it is night. The sun is bigg
(来源:文章屋网 www.wzu.com)
摘要: The earth moves round the sun,and the moon moves round the earth.When our part of the earth turns to the sun,it is day. When our part of the earth turns away from the sun,it is night. The sun is bigg
(来源:文章屋网 www.wzu.com)