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【題目】杭州某校地理興趣小組利用百葉箱研究氣溫的變化情況。據此回答下題。

1為防止一天中多次開箱觀測時陽光對儀器的直接輻射,百葉箱的箱門一般朝向(  )

A. B. 西 C. D.

2某日百葉箱的氣溫測量數據為22℃、17℃、35℃、28℃,其中35℃的記錄時間應該是(  )

A. 8時 B. 14時 C. 20時 D. 2時

【答案】

1 D

2 B

【解析】

試題

1】地球在公轉時,由于黃赤交角和地軸空間指向不變,使得一年內太陽光線的直射點有規律地在南北回歸線之間移動。因此北半球南方朝陽,為防止早、中、晚多次開箱觀測時,陽光對儀器的輻射,所以北半球百葉箱的箱門應朝向北,故本題選D

2】地面氣象觀測中,氣溫每日在02081420時觀測4次,一天中的最高氣溫出現在午后2時,即14時,最低氣溫出現在日出前后,35℃是一天中的最高氣溫,因此其記錄時間應該是14時,故本題選B

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