【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(jù)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. 東 B. 西 C. 南 D. 北

【2】某日百葉箱的氣溫測量數(shù)據(jù)為22℃、17℃、35℃、28℃，其中35℃的記錄時間應(yīng)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(zhuǎn)時，由于黃赤交角和地軸空間指向不變，使得一年內(nèi)太陽光線的直射點有規(guī)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(yīng)朝向北，故本題選D。

【2】地面氣象觀測中,氣溫每日在02、08、14、20時觀測4次，一天中的最高氣溫出現(xiàn)在午后2時，即14時，最低氣溫出現(xiàn)在日出前后，35℃是一天中的最高氣溫，因此其記錄時間應(yīng)該是14時，故本題選B。

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