A.CSVB.YAMLC.HTMLD.JSON
A.reB.lxmlC.html5libD.html.parser
A.Beautiful Soup库是解析、遍历、维护标签树的功能库B.Beautiful Soup库能够对HTML和XML等格式进行解析C.Beautiful Soup库也叫bs4库D.Beautiful Soup库可常用于生成标签树