设超级用户root当前所在目录为:/usr/local,键入cd命令后,用户当前所在

题型:单项选择题

问题:

设超级用户root当前所在目录为:/usr/local,键入cd命令后,用户当前所在目录为()。

A./home

B./root

C./home/root

D./usr/local

考点:计算机操作系统Linux操作系统Linux操作系统题库
题型:单项选择题
用方框中所给单词的适当形式填空,使短文正确,通顺。每词限用一次。
make,  story,  other,  when,  fly,  every,  favorite,  idea,  good,  invent
     Reading is an activity, people enjoy a lot in their free time.
     Some people like reading newspapers and 1______ enjoy novels or comic (喜剧的) books. My 2______
books are those about the lives of great people. Reading them always gives me a lot of 3______ on how to
make my own life better.
    Great people are remembered not because they were handsome or beautiful, but because they did not
give up 4______ their lives were difficult. They tried to use 5______ chance to change their lives and make
the world 6______.
    One good example is Orville and Wilbur Wright, the two brothers who 7______ the airplane. The plane has
 8______ the world into a small village. Hard work, not good luck, is the reason why the Wright Brothers
could invent this convenient (方便的) machine and become great people. Today we will remember them
when we see planes 9______ in the sky.
     Whenever I read 10______ about great people, I always learn a lot from them and they encourage me
to march on.
      This is why I enjoy reading about great people's lives.
题型:单项选择题

对肾脏毒性最大()

A.头孢菌素 

B.头孢他定 

C.头孢拉定 

D.头孢吡肟 

E.头孢呋辛

题型:单项选择题

食管长度为()

A.25cm

B.28cm

C.20cm

D.35cmm

E.50cm

题型:单项选择题

在挑取月最多风向及频率中,若最大频率有两个或以上相同时,挑取顺序为()。

A.平均风速

B.最大风速

C.出现回数

D.相邻风向频率之和

题型:单项选择题

混凝土受拉时的弹性模量与受压时相同。

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