下面关于集线器特点的描述中,错误的是()。 A.以太网是典型的总线形结构,但是从外部

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问题:

下面关于集线器特点的描述中,错误的是()。

A.以太网是典型的总线形结构,但是从外部结构来看,其物理结构是星形的

B.集线器工作在物理层

C.在10Mbps的传输速率下,使用粗线缆

D.集线器的每个端口通过一个RJ-45插头与网卡连接

考点:计算机等级考试网络工程师计算机网络工程师
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Mr Smith       from London. Now he is in China. He is        .He teaches English        a middle school. He works very hard. His students like       very much. He can       a little Chinese . His students often teach  him Chinese       Sundays. Mr Smith likes playing football . He often plays football       his students.
  Mr Smith       a son. His name is Jack. He is student. He studies in a middle school. He goes to school       bike everyday. He gets back home at four in the afternoon. He likes       TV in the evening.
小题1:
A.comeB.comesC.areD.coming
小题2:
A.a teacherB.a workerC.a driver D.a farmer
小题3:
A.onB.inC.toD.from
小题4:
A.heB.himC.sheD.her
小题5:
A.sayB.speakC.talkD.tell
小题6:
A.atB.onC.ofD.in
小题7:
A.forB.toC.withD.at
小题8:
A.hasB.haveC.there isD.there are
小题9:
A.onB.byC.inD.of
小题10:
A.seeingB.lookingC.watching D.looking at
题型:单项选择题

燃放烟花爆竹增强了春节喜庆,但也造成大气严重污染。烟花中含有的KNO3属于

A.氧化物

B.酸

C.碱

D.盐

题型:单项选择题

下列关于请求权的说法正确的是:

A.请求权不一定是救济权,也不一定是原权

B.请求权不一定适用诉讼时效

C.债权请求权不都受诉讼时效的限制

D.有的请求权受除斥期间的限制

题型:单项选择题

品质主导型考评的特点是( )

A.效度较差

B.标准易于确定

C.可操作性强

D.重在工作结果

题型:单项选择题

()

A.软塑,Ⅰ类

B.可塑,Ⅰ类

C.软塑,Ⅱ类

D.可塑,Ⅱ类

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