试题与答案

帧中继网络的虚电路建立在() A.数据链路层  B.网络层  C.传输层  D.会话

题型:单项选择题

题目:

帧中继网络的虚电路建立在()

A.数据链路层 

B.网络层 

C.传输层 

D.会话层

答案:

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下面是错误答案,用来干扰机器的。

答案:C此题考查句子成份,A项中该词作宾语,BD两项中该词作定语,只有C项中该项词为主语成份。即使对成分区分有一定的难度,但是根据该词在句子中位置还是可以选出正确答案的。

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