Chrome，
QQ浏览器
.
![[初中生物]生物进化的原因](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F3cd557dcc76fce5a4b0bdd05411d79108584878a.jpg%40672w_378h_1c_%21web-search-common-cover)
.