皮皮学，免费搜题
登录
搜题
【单选题】
关于输入输出重定向和管道联接的理解或描述，下列不正确的选项是（ ）。A.
ps -A|grep ssh是输入输出重定向语句
B.
输入重定向是指不使用系统提供的标准输入设备，并进行重新指定
C.
ls -l>file.txt和ls -l>>file.txt都表示输出重定向
D.
利用管道连接和grep命令可对ls的结果进行筛选，从而仅保留指定模式的信息
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】In one way of thinking, failure is part of life. In another way, failure may be a way towards success. The "Spider Story" is often told. Robert Bruce, leader of the Scots in the 13th century, was hidi...
【多选题】下列关于旅游者权利和义务的说法,错误的有( )。
A.
旅游者只有在人身安全遇有危险时，才有请求救助和保护的权利
B.
旅游者购买、接受旅游服务时，应当向旅游经营者如实告知全部个人健康信息
C.
旅游者有权自主选择旅游产品和服务
D.
旅游者的人格尊严、民族风俗习惯和宗教信仰应当得到尊重
E.
团队旅游者无论出境、入境、还是在境内，均不得分团、脱团
【单选题】Board A measures between 2.15 feet and 2.25 feet in length; board B measures between 2.20 feet and 2.30 feet in length. Column A Column B The length of board A The length of board B
A.
if the quantity in Column A is greater
B.
if the quantity in Column B is greater
C.
if the two quantity are equal
D.
if the relationship cannot be determined from the information given
【单选题】XYZ Co. Ltd. pays $500 000 for land that contains an estimated 500 000 board feet of timber. The land can be sold for $100 000 after the timber has been cut. If XYZ harvests 200 000 board feet in the ...
A.
$160 000
B.
$200 000
C.
$100 000
D.
$80 000
【单选题】It was because the applicant was too proud______he failed in the interview.
A.
therefore
B.
that
C.
so that
D.
so
【单选题】He was no longer a (an)____ who failed in big events, like the 2008 Beijing Olympics, where he finished an unimpressive 11 th .
A.
anything
B.
nothing
C.
anybody
D.
nobody
【简答题】The ancient Olympic s 1_______ in Athens, where many kinds of competitions were held between athletes from Greek city-states and kingdoms. In some legend, Heracles and Zeus were 2_____ as the prog...
【单选题】Janelle cut a board 30 feet long into 2 pieces. The ratio of the lengths of the 2 pieces is 2:3. What is the length,to the nearest foot, of the shorter piece?
A.
5
B.
6
C.
12
D.
15
E.
18
相关题目：
参考解析：
知识点：
题目纠错 0
发布
