单项选择题
在OSPF网络中,路由器定时发出hello分组与特定的邻居进行联系。默认情况下,如果()内没有收到这种分组,就认为对方不存在。
A.20秒
B.30秒
C.40秒
D.50秒
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单项选择题
听力原文: An elderly woman yesterday made a legal claim against a department store because it had wrongly accused her of stealing a Christmas card. Ms. Doss White, 72 years old, is claiming $3,000 damages from the store for wrongful arrest and false imprisonment. Ms. White visited the store while doing Christmas shopping, but did not buy anything. She was followed though the town by a store manager. He had been told that a customer saw her take a card and put it in her shopping bag. He stopped her at a bookstore as she was reading a book. Ms. White said, 'This man, a total stranger, suddenly grasped my bag and asked if he could look in it.' She was taken back to the store and shut in a small room in full view of shopper for 20 minutes until the police arrived. At the police station she was bodysearched and nothing was found. Her lawyer said the department store sent an insincere apology and they insisted that she may have been stealing. The hearing continues today.(31)A.She was found stealing in a bookstore.B.She caught someone in the art of stealing.C.She admitted having stolen something.D.She said she was wrongly accused of stealing.
A.'
B.
(31)
A.She
C.
B.She
D.
C.She
E.
D.She
F.
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单项选择题
IPv4地址可以划分为网络号和主机号两部分。在下面的地址标记中,用0表示所有比特为0,用-1表示所有比特为1。以下选项中,()只能用于本机测试。
A.{0, 0}
B.{127, 主机号}
C.{10, 主机号}
D.{192, -1}
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