题目内容

【题目】杭州某校地理兴趣小组利用百叶箱研究气温的变化情况。据此回答下题。

【1】为防止一天中多次开箱观测时阳光对仪器的直接辐射，百叶箱的箱门一般朝向（　　）

A. 东 B. 西 C. 南 D. 北

【2】某日百叶箱的气温测量数据为22℃、17℃、35℃、28℃，其中35℃的记录时间应该是（　　）

A. 8时 B. 14时 C. 20时 D. 2时

【答案】

【1】 D

【2】 B

【解析】

试题

【1】地球在公转时，由于黄赤交角和地轴空间指向不变，使得一年内太阳光线的直射点有规律地在南北回归线之间移动。因此北半球南方朝阳，为防止早、中、晚多次开箱观测时，阳光对仪器的辐射，所以北半球百叶箱的箱门应朝向北，故本题选D。

【2】地面气象观测中,气温每日在02、08、14、20时观测4次，一天中的最高气温出现在午后2时，即14时，最低气温出现在日出前后，35℃是一天中的最高气温，因此其记录时间应该是14时，故本题选B。

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