题目内容

【题目】下表为三地连续两日日出与日落时刻(北京时间)表。据此回答下列各题。

时间
地点

当日

次日

日出

日落

日出

日落

①

9：00

23：00

8：58

23：02

②

7：19

18：41

7：20

18：40

③

5：40

18：48

5：39

18：49

【1】

A. ②③① B. ①③② C. ②①③ D. ③①②

【2】

A. 北极圈内极昼的范围逐渐变小

B. 太阳直射点位于北半球且向北移

C. 地球公转速度逐渐加快

D. 各地昼夜长短相差最小

【答案】

【1】A

【2】B

【解析】试题分析：

【1】纬度越高，昼夜的变化幅度（即昼夜长短的差）越大，故直接根据三个城市该日的昼夜长短的差可判断纬度高低。

【2】根据图示③地的日出日落时间计算，该日北京出现昼长夜短，且昼长逐渐变长，说明太阳直射点位于北半球，且太阳直射点逐渐向北移，说明时间应在春分日到夏至日之间，则地球公转逐渐接近远日点，则公转速度不断减慢，由于太阳直射点位于北半球，且直射点向北移，则北极圈内极昼的范围不断扩大，世界各地昼夜长短相差最小为春秋分日。

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