S7-200系列PLC常开触点与母线相连使用()指令。
A.LD
B.LDN
C.A
D.AN
第1题
第6题
The Dormouse's story
</book></book></book></book></book></bookstore></selector></selector></selector></selector></selector></selector></class></class></selector></selector></class></selector></selector></selector></selector></bookstore></body></html></title></generator></selector></selector></selector></selector></bookstore></body></html></title></book></bookstore></body></html>
Once upon a time there were three little sisters; and their names were Elsie, Lacie and Tillie; and they lived at the bottom of a well.
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''' soup=BeautifulSoup(doc,"lxml") ___________________________________ for tag in tags: print(tag) 查找文档中class="sister"的元素,缺失语句是:
A、tags=soup.find(name=None,attrs={"class":"sister"})
B、tags=soup.find(attrs={"class":"sister"})
C、tags=soup.find_all(attrs={"class":"sister"})
D、tags=soup.find_all(name=None,attrs={"class":"sister"})
第9题
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