正确答案: B

修改abc目录的访问权限为可读、可写、可执行

题目：在Linux操作系统中，命令"chmod-777/home/abc"的作用是____.

解析：chmod命令用来修改文件的权限。命令"chmod-777/home/abc"等价于"chmod-111111111/home/abc"其作用是修改abc目录的访问权限为对任何用户均为可读、可写、可执行。

查看原题 点击获取本科目所有试题

举一反三的答案和解析：

[单选题]C is sometimes referred to as a 'high -level(66)language'. Some people think that's an insult, but it's actually a deliberate and significant aspect of the language. If you have(67)in assembly language, youll probably find C very natural and comfortable(although if you continue to focus too heavily on machine - level details, youll probably end up with unnecessarily non- portable programs). If you havent programmed in assembly language, you may be frustrated by C 's lack of certain higher - level features. In either case, you should understand why C was de- signed this way: so that seemingly - simple constructions expressed in C would not expand to arbitrarily expensive( in time or(68))machine language constructions when(69). If you write a C program simply and succinctly, it is likely to result in a succinct, efficient machine language executable. If you find that the(70)resulting from a C program is not efficient, it's probably because of something silly you did, not because of something the compiler did behind your back which you have no control over. In any case, there's no point in complaining about C's low - level flavor: C is what it is.

assembly

解析：解析：assembly：汇编语言

[单选题]五笔字型码输入法属于(35)。

形码输入法

解析：解析：五笔字型码输入法是根据对字进行拆分输入，是形码输入法。