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【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. B. 西 C. D.

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02081420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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