读图及下表，回答下列问题： 地点①②③④海拔高度（米）17143760.858.

题目：

读图及下表，回答下列问题：

（1）说明①、④两地年均温和年降水量差异的原因。                                                                                                                                                                                                                                                                                                                              （2）分析①地降水量高于②地原因。                                                                                                                                                              （3）分析③和④地年均温接近但降水量差异较大的原因。