下图中各城市的大气最大降温高度(距地面高度),是连续三年中最强

下图中各城市的大气最大降温高度(距地面高度),是连续三年中最强的15次冷空气影响的统计平均值。读图回答下题。

1.据图反映的变化趋势,对下列各地最大降温高度的推断,正确的是

A.合肥小于南宁             B. 株洲大于石家庄 

C.辽河平原大于洞庭湖平原   D.长江三角洲小于珠江三角洲

2.形成图示趋势的主要影响因素是

A.获得太阳辐射多少  B.距冬季风源地远近 

C.下垫面性质的差异  D.对流层厚度的不同

答案

1.C

2.B


解析:

1.关键是抓住图的变化趋势,图中显示城市的最大降温高度数值越大说明高度越大,在看其纬度变化会发现,整体上纬度高的地方降温高度偏大,具体地点需要具体分析。由此判断C是正确的,辽河平原在图中能代表的城市是沈阳,洞庭湖平原看以借鉴处于30°N附近的长江中下游平原城市。

2.据材料分析最大降温高度是连续3年中最强的15次冷空气影响的平均值,再加上上题中分析的最大高度南北方向的变化趋势得出结论,主要影响因素是距冬季风源地的远近。

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