单项选择题
A.Beautiful SoupB.DNSC.hrefD.CSS
A.re.pattern()B.re.split()C.re.run()D.re.compile()
A.etree.parse()B.etree.XML()C.etree.HTML()D.etree.fromstring()
A.[0]B.[1]C.[first()]D.[min()+1]
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