题目内容
（请给出正确答案）
[主观题]
在广播或者NBMA网络中，DR和DROther建立邻接关系，BDR也和DROther建立邻接关系，DR和BDR之间不需要建立邻接关系（）
A．true
B．false
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第2题
下列关于OSPF中DR的说法正确的是()。
A.网段中的DR一定是priority最大的路由器。
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B.在广播和NBMA以及point-to-muiltipoint类型的接口上才会选举DR
C.DR是指某个网段中概念，是针对路由器的接口而言的。某台路由器在一个接口上可能是DR，在另一个接口上可能是BDR，或者是DROther。
D.两台DROther路由器之间不进行路由信息的交换，也不会互相发送HELLO报文。
第6题
What can be inferred from the teacher's words?
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A．The student cannot choose the time.
B．Dr. Roberts may tell the student the answer.
C．Dr. Roberts is the dean of the School of Economics.
D．She does not want to answer the student's question.
第7题
How about the boy when Dr. Johnson arrived in the hospital?
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A．The boy became better.
B．The boy died.
C．The boy disappeared.
第8题
What does the woman mean?
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A．Dr. Wang is as busy today as yesterday.
B．Dr. Wang is not so busy today as yesterday.
C．Dr. Wang is busier today than yesterday.
第9题
What does the woman mean?
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A．Dr. Wang is busier today than yesterday.
B．Dr. Wang is not so busy today as yesterday.
C．Dr. Wang is as busy today as yesterday.
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