海市蜃楼看到的景象是哪里来的？<div？class=＂g-figure？g-figure-layout-v＂><div？class=＂g-figure-img-wrap？g-img-def＂><div？class=＂g-img-mask＂><span？class=＂g-figure-img＂？style=＂background-image:？url(https://so.360tres.com/dmfd/646_428_100/t01dd64672845d133af.jpg)＂></span><span？