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把文件写入到csv文件的程序段如下:ls=[‘北京’,’上海’,’天津’,’重庆’]f=open("city.csv&q
把文件写入到csv文件的程序段如下:
ls=[‘北京’,’上海’,’天津’,’重庆’]
f=open("city.csv","w")
______________
f.write(','.join(row)+'/n')
f.close()
划线处的代码应该为()。
A. for i in ls
B. for row in ls
C. for i in range(len(ls))
D. for row in range(len(ls))
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