题目
A./mnt
B./root
C./dev
D./proc
第4题
A.with open('data/file.txt', 'r') as f:
B.with open('data//file.txt', 'r') as f:
C.with open('datafile.txt', 'r') as f:
D.with open('datafile.txt', 'r') as f:
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