下图是“阿尔卑斯山、天山、喜马拉雅山的垂直自然带分布图”，读图完成下列问题。
(1)珠穆朗玛峰南坡比北坡雪线__________，主要原因是__________。
(2)阿尔卑斯山南坡比北坡雪线__________，主要原因是__________。
(3)判断天山A、B两坡坡向：__________是北坡，__________是南坡。
(4)三地自然带最简单的是__________，原因是__________。
正确答案及解析
正确答案
解析
(1)低南坡为迎风坡，降水多，积雪多，雪线低 (2)高南、北坡降水差异不大，南坡纬度低，温度高
(3)B； A
(4)天山天山纬度较高，基带为温带草原带，自然带垂直变化的范围较小，所以自然带较为简单
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