单选题
小林编写一段文件读写操作代码，文件如下图，代码段如下：
file=open('ceshi.txt','w')file.write("python is a programming language.")file.close( )file=open('ceshi.txt','r')print(file.read( ))该代码段运行后，输出的结果为？（?）
A.
IA Distributed System Based on Python.
B.
python is a programming language.
C.
IA Distributed System Based on Python. python is a programming language.
D.
程序编译错误，不会输出结果
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