职业培训教案的编写特别注重______。
A.语言的精练 B.培训场地和培训方法的选择C.教学环节设计的完美 D.操作实施的规范性
参考答案:B
Networks can be interconnected by different devices. In the physical layer, networks can be connected by (11) or hubs, which just move the bits from one network to an identical network. One layer up we find bridges and switches, which operate at data link layer. They can accept (12) ,examine the MAC address, and forward the frames to a different network while doing minor protocol translation in the process. In the network layer, we have routers that can connect two networks. If two networks have (13) network layer, the router may be able to translate between the packer formats. In the transport layer we find transport gateway, which can interface between two transport connections. Finally, in the application layer, application gateways translate message (14) . As an example, gateways between Internet e-mail and X.400 e-mail must (15) the e-mail message and change various header fields.
A. framesB. packets C. packages D. cells
《查封(扣押)决定书》是指执法部门对涉案的()作出查封(扣押)决定时使用的执法文书。
A、场所、设施或者证据
B、场所、设施或者物品
C、场所、物品或者证据
D、设施、物品或者证据