题目内容

【题目】我国某校地理兴趣小组分别在二分二至日，于当时正午时刻测量学校旗杆的影子长度，数据记录见下表。据此完成下列问题。

某校地理兴趣小组观察记录表

测量时间（节气）

①

②

③

④

旗杆影长（米）

5.2

0

5.2

12.9

【1】表中测量时间②对应的节气是（ ）

A. 夏至 B. 春分 C. 冬至 D. 秋分

【2】该学校可能位于（ ）

A. 辽宁 B. 云南 C. 山东 D. 湖南

【答案】

【1】A

【2】B

【解析】

地球在自转的同时还在不断地绕着太阳公转，方向都是自西向东，周期是一年，因为地球在公转时，地轴始终与平面保持66.5°的夹角，所以太阳直射的地方不同，导致各地出现不一样的季节和不一样的昼夜长短，就产生了季节变化和五带的划分。

【1】由题目可知，我国某校的旗杆影子长短数据中，有一天的时间是0米，说明这一天正午出现了太阳直射现象，是夏至日，故选A。

【2】由上题可知，该地在夏至日时出现了直射现象，说明该地是有北回归线穿过的省区，以上四个省区中，只有云南省符合条件，故选B。

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