【題目】讀昆明準靜止鋒示意圖,回答下列各題。

【1】此鋒面形成的季節(jié)多在

A春季 B夏季 C秋季 D冬季

【2】此時貴陽附近的天氣特征是

A陰雨連綿 B晴空萬里 C大雪紛飛 D暴風驟雨

【3】據(jù)圖分析昆明準靜止鋒的成因主要是

A暖氣團勢力強 B冷氣團勢力強

C地形影響 D海陸位置影響

【答案】

【1】D

【2】A

【3】C

【解析】

試題分析:

【1】讀圖,此鋒面是準靜止鋒,冷暖氣團勢力相當。結合緯度分析,該地位于云貴高原地區(qū),緯度較低,冬季冷空氣南下,受地形阻擋,與南方的暖空氣相持不下準靜止鋒,形成的季節(jié)多在冬季,D對。其它季節(jié)冷空氣勢力弱,加上沿途地形阻擋,對該地影響小,不能形成準靜止鋒,A、B、C錯。

【2】據(jù)圖分析,此時,貴陽位于冷空氣一側,冷鋒降雨在鋒后,暖鋒降雨在鋒前,即冷空氣一側是雨區(qū)。此時正值冬季,所以貴陽附近的天氣特征是陰雨連綿,A對,B錯。該地緯度低,沒有大雪紛飛天氣,C錯。暴風驟雨天氣出現(xiàn)在夏季,D錯。

【3】據(jù)圖分析,昆明準靜止鋒的成因主要是地形影響,冷空氣受地形阻擋,不能繼續(xù)南下,與暖空氣相持不下,形成準靜止鋒,C對。 暖氣團勢力強形成暖鋒,冷氣團勢力強形成冷鋒,A、B錯。兩地的海陸位置影響不大,D錯。

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