以下哪种情况下，WINS客户机会向WINS服务器发送名称释放请求（）

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问题多项选择题

A.WINS客户机网卡禁用时

B.WINS客户机关闭系统时

C.WINS客户机停止已注册的网络服务时

D.WINS客户机宕机时

答案

参考答案：B, C

单项选择题

There was a big sea bird that was very beautiful. One day, the sea bird (1) to a country and stayed outside of a palace. The Emperor asked his men to bring it to the palace. Then he said," As a (2) for the sea bird, we’ll set up the band and get the best food and wine ready for it. "(3) they played the best music for the sea bird, but it looked (4) . The Emperor introduced the most delicious food and best wine and asked the bird to have them. But the sea bird (5) After three days without eating or drinking, the sea bird (6) .The Emperor said (7) , "Why didn’t you eat I gave you all of the (8) !"The story tells us that what some people believe to be the best music and the best food aren’t so for (9) . Feed a bird according to a bird’s wants, not a person’s. The (10) "Do to others as you would have others do to you. " is never really suitable or right.

第（4）空应选择（）

A．excited

B．bored

C．interested

D．pleased

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单项选择题

斗轮机供电电源电压为（）.

A、220V

B、380V

C、3000V

D、6000V

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