14.地球表面产生昼夜交替现象的主要原因是 A.地球是一个不规则的球体b.地球时刻不停地绕地轴自转c.地球不停地绕着太阳公转d.地轴和赤道 Template




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tomski14.地球表面产生昼夜交替现象的主要原因是 a.地球是一个不规则的球体b.地球时刻不停地绕地轴自转c.地球不停地绕着太阳公转d.地轴和赤道 coloring