题目内容

《工伤保险条例》不是社会保障的组成部分

A. 对
B. 错

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单选题A ( )is a set of rules that controls the interaction of different devices in a network or internetwork.

A. model
B. protocol
C. dialog
D. synchronization point

单选题 The OSI model has ( ) layers.

A. five
B. six
C. seven
D. any of the above

单选题 The ( )layer of the OSI model organizes bits into logical data units called frames.

A. physical
B. data-link
C. network
D. transport

单选题 The ( ) layer of the OSI model enables a person to access the network.

A. data-link
B. transport
C. application
D. physical

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