Font Awesome字体图标调不出来，请高手指点

Question

我想调用的是下面这个用户标识的图标，用的代码：<i class="fa fa-user-o  fa-lg"></i>，可是调不出来。

在同一个html文档里，好像4.7以下的没有问题，新出的这个用户标识的图标调不出来，请帮忙看下。。。

Answer 1

你是不是没有吧包含这个图标的包引用进去呀？我以前也出现过这种情况，就是没引入。。

Answer 2

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Answer 3

应该是图标文件没有导入或者路径不对吧!