【題目】下圖為北半球中緯度某地某日5次觀測到的近地面氣溫垂直分布示意圖。當日天氣晴朗,日出時間為5時。讀圖回答下題。

1

A. 5時、20時大氣較穩(wěn)定

B. 12時、15時出現(xiàn)逆溫現(xiàn)象

C. 大氣熱量直接來自太陽輻射

D. 氣溫日較差自下而上增大

2

A. 日落時間為17

B. 與?谙啾劝讜冚^長

C. 正午地物影子年內(nèi)最長

D. 正午太陽位于正北方向

【答案】

1A

2B

【解析】試題分析:

1】根據(jù)大氣的主要的直接熱源是地面輻射,C錯。一天中最低氣溫在日出前后,最高氣溫在14時左右。讀圖,結(jié)合圖中曲線,越靠近地面,氣溫日較差越大,D錯。圖中12時、15時的氣溫垂直變化規(guī)律是遞減,下面熱,上面冷,不易發(fā)生逆溫現(xiàn)象,B錯。5時、20時氣溫下面冷,上面暖,大氣較穩(wěn)定,A對。

2】當日該地是5時日出,日出與日落時間關(guān)于中午12時對稱,該地日落時間應(yīng)該是19時,A錯。該地位于北半球,晝長為14小時,說明此時北半球是夏季。北半球緯度越高,晝越長,當?shù)卦谥芯暥,海口緯度?/span>20°N,在低緯度,所以比?谑械陌讜円L,B對。夏季,物影較短,C錯。正午太陽位于正南方向,D錯。

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