下图分别是1998~2010 年华北平原部分地区“冬小麦生长期平均耗水

   下图分别是1998~2010 年华北平原部分地区“冬小麦生长期平均耗水量图”和“生长期平均有效降水量图”。读图完成17~18题。

 

17.图示地区冬小麦生长期缺水最严重的是

A.秦皇岛     B.保定    C.衡水     D.邯郸

18.图示地区冬小麦生长期缺水的原因有

生长期内降水量少  ②春温回升快,蒸发旺盛远离海洋,水汽不易到达  ④锋面雨带停留时间较短

A①②     B①③    C③④     D①④

答案

CA

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