题目内容

如下 有关文件扩展名的陈述中,哪些是正确的?

A. 文件扩展名仅仅是文件名的一部分
B. 文件扩展名全部由应用程序来照料
C. 文件的内容依赖于文件扩展名
D. 文件扩展名并不总是与文件中的内容一致
E. 文件扩展名对于Linux内核没有任何特殊的含义

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更多问题

用户dog登录了Linux系统,而当前的工作目录并不是他的家目录,请问他可以使用如下的哪些命令切换回他的家目录?

A. cd
B. cd ..
C. cd ~
D. cd /home
E. cd ../~
F. cd $HOME

用户dog在Linux操作系统上使用命令cp -f ~/girldog /tmp/girldog,请问在以下有关这一命令的陈述中,哪些是正确的?

A. /dog/girldog文件被复制到/tmp/girldog目录中
B. 如果/tmp/grildog已经存在并是一个文件,它将被覆盖
C. dog用户家目录中的girldog文件将被复制到/tmp/girldog中
D. 如果/tmp/girldog不存在,~/girldog文件将被复制为/tmp/girldog

Question 1[音频]

A. He was very active in community service
B. He did quite well in mathematics and science
C. He had excellent records in almost all subjects
D. He searched for information to keep himself busy

Question 2[音频]

A. Because he met a programmer called Allen there
Becuase he joined Information Sciences Inc. there
C. Because he liked the serious academic environment there
D. Because it was there he had his first contact with a computer

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