下图为世界某区域,读图完成3~4题。 3.A城海拔1077米,冬季常出

下图为世界某区域,读图完成34题。

3A城海拔1077米,冬季常出现能使10厘米左右的积雪在一天之内融化消失的“吃雪风”。原因是(    

A.暖流流经增温                      B.反气旋控制气流下沉增温

C.暖锋过境增温                      D.山地背风坡气流下沉增温

4.以下关于R河的叙述,不正确的是(    

A.落差大,水能丰富                  B.春季积雪融化,形成春汛

C.下游有凌汛现象                    D.流域内林业发达

答案

DC

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