皮皮学，免费搜题
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搜题
【单选题】
片剂辅料中常用的崩解剂有A.
低取代羟丙基纤维素
B.
纤维素
C.
滑石粉
D.
硬脂酸镁
E.
淀粉浆
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】from scrapy.selector import Selector htmlText=''' Harry Potter 29.99 学习 XML 39.95 ''' selector=Selector(text=htmlText) ____________________________________ print(s.extract_first()) ___________________...
A.
s=selector.xpath("//book[position=1]/title"); s=selector.xpath("//book[position=2]/title")
B.
s=selector.xpath("//book[position()=1]/title"); s=selector.xpath("//book[position()=2]/title")
C.
s=selector.xpath("//book[position()=2]/title"); s=selector.xpath("//book[position()=1]/title")
D.
s=selector.xpath("//book[position=2]/title"); s=selector.xpath("//book[position=1]/title")
【单选题】The following description of class selector of CSS is correct:
A.
Class selector names start with "#" followed by English symbols。
B.
Class selector names start with "." followed by an English symbol。
C.
Class selector only needs to be defined, and the style will change automatically after it is defined。
D.
When applying a class selector, you need to introduce a class selector through the ID attribute, such as < p id="class selector">。
【单选题】from scrapy.selector import Selector htmlText=''' H arry P otter 29.99 ''' selector=Selector(text=htmlText) _________________________ print(s) print(s.extract()) for e in s: print(e.extract()) 程序结果: [...
A.
s=selector.xpath("/book/title/text()")
B.
s=selector.xpath("//book/title/text")
C.
s=selector.xpath("/book/title/text")
D.
s=selector.xpath("//book/title/text()")
【简答题】压缩系数 的下标a1-2的含义是 ( )。
(1)1表示自重应力,2表示附加应力; (2)压应力从1MPa增加到2MPa
(3)压应力从lOOkPa增加到200kPa; (4)无特定含义,仅是个符号而已 (7.5分)A. 1表示自重应力，2表示附加应力 B. 压应力从1MPa增加到2MPa C. 压应力从100kPa增加到200kPa D. 无特定含义，仅是个符号而已
【单选题】CSS selector types do not include which of the following options:
A.
HTML tag selector。
B.
Class selector。
C.
Type selector。
D.
ID selector。
【单选题】from scrapy.selector import Selector htmlText=''' Harry Potter 29.99 学习 XML 39.95 ''' selector=Selector(text=htmlText) ____________________________________________________ print(s.extract_first()) s=s...
A.
s=selector.xpath("//book/title[@lang='chinese']/text")
B.
s=selector.xpath("//book/title[lang='chinese']/text")
C.
s=selector.xpath("//book/title[@lang='chinese']/text")
D.
s=selector.xpath("//book/title[@lang='chinese']/text()")
【简答题】故修礼者王,为政者强, ,聚敛者亡。 ——《荀子•王制》
【单选题】from scrapy.selector import Selector htmlText=''' Harry Potter 29.99 学习 XML 39.95 ''' selector=Selector(text=htmlText) _____________________________________ print(s) print(s.extract()) for e in s: pri...
A.
s=selector.xpath("book/title/text()")
B.
s=selector.xpath("//book/title/text()")
C.
s=selector.xpath("/book/title/text()")
D.
s=selector.xpath("/book/title/text")
【简答题】翻译“故修礼者王，为政者强，取民者安，聚敛者亡。故王者富民，霸者富士，仅存之国富大夫，富筐箧，实府库。筐箧已富，府库已实，而百姓贫；夫是之谓上溢而下漏。入不可以守，出不可以战，则倾复灭亡可立而待也。”
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