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【題目】我國某校地理興趣小組分別在二分二至日,于當時正午時刻測量學校旗桿的影子長度,數據記錄見下表。據此完成下列問題。

某校地理興趣小組觀察記錄表

測量時間(節氣)

旗桿影長(米)

5.2

0

5.2

12.9

1表中測量時間②對應的節氣是( )

A. 夏至 B. 春分 C. 冬至 D. 秋分

2該學校可能位于( )

A. 遼寧 B. 云南 C. 山東 D. 湖南

【答案】

1A

2B

【解析】

地球在自轉的同時還在不斷地繞著太陽公轉,方向都是自西向東,周期是一年,因為地球在公轉時,地軸始終與平面保持66.5°的夾角,所以太陽直射的地方不同,導致各地出現不一樣的季節和不一樣的晝夜長短,就產生了季節變化和五帶的劃分。

1由題目可知,我國某校的旗桿影子長短數據中,有一天的時間是0米,說明這一天正午出現了太陽直射現象,是夏至日,故選A。

2由上題可知,該地在夏至日時出現了直射現象,說明該地是有北回歸線穿過的省區,以上四個省區中,只有云南省符合條件,故選B。

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