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【题目】下列自然现象主要由地球自转造成的是(  )

A. 昼夜长短的变化B. 四季变化现象

C. 昼夜现象D. 昼夜交替现象

【答案】D

【解析】

根据地球绕地轴在不停的旋转,是地球的自转。地球自转的方向是自西向东,自转的周期是24小时即一天。地球自转产生的地理现象,是昼夜交替和时间差异;地球绕太阳的运动,是地球的公转。地球公转的方向是自西向东,公转的周期是365天即一年。公转产生的现象,是四季交替,进行分析解答。

地轴是倾斜的,地轴与地球公转轨道面之间存在66.5°的夹角,因此地球公转过程中太阳直射点会在南北回归线之间移动,太阳直射点的移动导致晨昏线的摆动,由此,昼夜长短变化不一,故A错误;

四季变化现象是由于地球公转形成的,故B错误;

地球被太阳照射的一面是昼半球,背向太阳的一面是夜半球.地球即使不自转,也有昼夜现象,只是不存在昼夜的交替,故C错误;

地球自转产生了昼夜交替和时间差异现象,故D正确;

故选:D。

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