题目内容

【题目】下列现象由地球自转引起的是()

A.我国大部分地区四季分明B.天安门广场升国旗的时间冬季比夏季晚

C.极地地区有极昼、极夜现象D.时间差现象

【答案】D

【解析】

地球绕地轴不停转动,叫地球自转。地球自转的方向是自西向东,自转的周期是一天。地球自转产生的现象是昼夜交替、日月星辰东升西落和时间差异。地球在自转的同时还要绕着太阳转动叫地球公转,地球公转的方向是自西向东,公转的周期是一年。地球围绕太阳公转产生了四季变化、正午太阳高度的变化、昼夜长短的变化等。

地球绕地轴不停转动,叫地球自转,地球自转产生的现象是昼夜交替、日月星辰东升西落和时间差异;地球围绕太阳公转产生了四季变化、正午太阳高度的变化、昼夜长短的变化等。 “我国大部分地区四季分明”、 “天安门广场升国旗的时间冬季比夏季晚”、“极地地区有极昼、极夜现象”是由地球公转产生, “时间差现象”是由地球自转产生。故选:D

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