启动一个前台线程 import threading import time import rando

单项选择题以下哪项印章管理工作不属于行政部门的管理指责（）

单项选择题（多选题）关于厚壁圆筒的热应力，下面（）描述是正确的。

单项选择题 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")