题目内容

动脉导管未闭( )

A. X线胸片显示右房、右室大，肺野充血，肺动脉段突出，主动脉结较小
B. X线胸片显示右房、右室大，肺野清晰，肺动脉段突出，主动脉结正常
C. X线胸片显示右房、右室大，肺野清晰，肺动脉段凹陷，主动脉结增大
D. X线胸片显示左房、左室大，肺野充血，肺动脉段突出，主动脉结增大
E. X线胸片显示左房、左室大，肺野充血，肺动脉段突出，主动脉结较小

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简述通货紧缩的含义。

To a router, a flow is a (1) of packets that share the same Characterstics, such as traveling the same (2) ,using the same (3) ,having the same kind of security, and so on. A router that supports the handling of flow labels has a (4) table. The table has an entry for each active flow label; each entry defines the (5) required by the corresponding flow label. 4（）

A. flow table
B. flow label
C. rout table
D. Tag table

In low-speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high-speed networks, this approach often works poorly, because in the (1) between sending the notification and notification arriving at the source, thousands of additional (2) may arrive. In ATM network, a major tool for preventing (3) is (4) control. When a host wants a new virtual (5) ,it must describe the traffic to be offered and the service expected. 2（）

A. packets
B. cells
C. message
D. files

家电下乡政策的顺利推行，需要政府、企业和消费者三方面联动，才能收到良好的效果。请简要概括目前企业方面存在的问题和困扰。要求：紧扣给定材料，全面准确，条理性强，不超过200字。