有一种互联设备工作于网络层,它既可以用于相同(或相似)网络间的互联,也可以用于异构网

题型:单项选择题

问题:

有一种互联设备工作于网络层,它既可以用于相同(或相似)网络间的互联,也可以用于异构网络间的互联,这种设备是( )。

A.集线器

B.交换机

C.路由器

D.网关

考点:计算机等级考试网络技术局域网基础(四)
题型:单项选择题

阅读短文,回答问题。

      We have a new flat. It's on the second floor. There are three bedrooms, a kitchen, a bathroom, and a living

room. I have my own room now. It's small and nice. There is a mirror, a bed and a big desk. There is a new

computer. It's on the desk. There are pink curtains and two end tables. I love my new flat very much.

1. Our flat is on the floor.[ ]

A. first

B. second

C. third

2. How many rooms are there? [ ]

A. Four.

B. Five.

C. Six.

3. My own room is and[ ]

A. small, nice

B. big, nice

C. small, dirty (脏的)

4. Where is the computer?[ ]

A. It's on the desk.

B. It's on the bed.

C. It's in front of the mirror.

5. What colour are the curtains? [ ]

A. Yellow.

B. Green.

C. Pink.

题型:单项选择题
已知函数y=x+
a
x
有如下性质:如果常数a>0,那么该函数在(0,
a
]
上是减函数,在[
a
,+∞)
上是增函数.
(1)如果函数y=x+
3m
x
(x>0)
的值域是[6,+∞),求实数m的值;
(2)求函数f(x)=x2+
a
x2
(a>0)在x∈[1,2]上的最小值g(a)的表达式.
题型:单项选择题

---I’m fed up with studying.

---What nonsense! You’ve only got one year more to do. Then you’ll have your qualification and after that _____________

A.content is better than riches

B.it is not your cup of tea

C.the world is your oyster

D.well begun is half done

题型:单项选择题

结构化程序设计方法的主要原则可以概括为自顶向下、逐步求精、 【2】 和限制使用goto语句。

题型:单项选择题

合资企业:是指合资双方或多方(),(),(),()的企业。

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