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【单选题】
在OSI参考模型中，上层协议实体与下层协议实体之间的逻辑接口叫做服务访问点(SAP)。在Internet数据帧中，目的地址“0x0F781C6001”属于(20)的服务访问点。A.
数据链路层
B.
网络层
C.
传输层
D.
应用层
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】用于手工钎焊的 Sn63焊锡丝的熔点只有183°C,从成分上看,Sn63焊锡丝属于()。 A亚共晶合金 B 共晶合金 C过共晶合金 D都不是
【单选题】My old neighbor Charles felt ______ after his children moved out.
A.
lonely
B.
safely
C.
angrily
D.
happily
【单选题】用于手工钎焊的 Sn63焊锡丝的熔点只有183°C,从成分上看,Sn63焊锡丝属于()。 A亚共晶合金 B共晶合金 C过共晶合金
A.
亚共晶合金
B.
共晶合金
C.
过共晶合金
D.
都不是
【单选题】My old neighbor Charles felt__________ after his children moved out.
A.
safely
B.
lonely
C.
happyly
D.
easier
【简答题】On the train I an old lady who happened to be a neighbor of my daughter’s.
【简答题】A young father was visiting an old neighbor. They were standing in the old man's garden，and talking about children. The young man said，“How strict should parents be with their children？” The old man p...
【单选题】The old man, my new neighbor, was seen _____ out of the house after the murder.
A.
came
B.
had come
C.
comes
D.
to come
【简答题】One of my. next-door neighbor is a sweet 92-year-old Polish lady. A few days ago, I came back from a trip. As I was 16 . my clothes in my room, I heard a(n) 17 , frantic(发疯的) knock on the door. It was...
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