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【单选题】
关于ARP协议，错误的是（）A.
ARP协议主要实现IP地址到物理地址的映射。
B.
默认情况下，ARP请求是以广播方式发出的。
C.
默认情况下，ARP响应报以广播方式发出的
D.
ARP是解决同一个局域网上的主机或路由器的IP地址和硬件地址的映射问题。
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举一反三
【单选题】What’s the relationship between“John’S uncle bought a new car yesterday”and“John has an uncle”?
A.
Entailment．
B.
Contradiction．
C.
Tautology．
D.
Presupposition．
【单选题】What does John mean?
A.
John may go with Kate.
B.
Nobody can go with John.
C.
Kate has to go by herself.
【单选题】When John Nash went into his mental illness, he didn't realize that ______.
A.
he was quite alerted
B.
he was enlightened
C.
it was mental illness
D.
it was in a movie
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