题目内容
（请给出正确答案）
[主观题]
可用微量升华法进行理化鉴别的药材有 A.大黄 B.延胡索 c.桔梗 D.胡黄连 E.川贝
可用微量升华法进行理化鉴别的药材有
A.大黄 B.延胡索
c.桔梗 D.胡黄连
E.川贝母
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from scrapy.selector import Selector htmlText=''' <html> <body> <bookstore> <title>books</title> <book> <title>Novel</title> <title lang="eng">Harry Potter</title> <price>29.99</price> </book> <book> <title>TextBook</title> <title lang="eng">Learning XML</title> <price>39.95</price> </book> ''' selector=Selector(text=htmlText) _____________________________________ for e in s: print(e) 程序结果： <selector xpath="//book/title" data="<title>Novel</title>"> <selector xpath="//book/title" data="<title lang=" eng">Harry Potter</selector></selector></bookstore></body></html></title>"> <selector xpath="//book/title" data="<title>TextBook</title>"> <selector xpath="//book/title" data="<title lang=" eng">Learning XML</selector></selector></book></bookstore></body></html></title>">
A、s=selector.xpath("/book").xpath("./title")
B、s=selector.xpath("//book").xpath("./title")
C、s=selector.xpath("//book").xpath("/title")
D、s=selector.xpath("/book").xpath("/title")
