新产品的来源有哪五类?
参考答案:
①市场营销;
②生产过程、生产工艺、质量分析都可能成为新产品的来源;
③技术、企业内、外部的技术研究与开发;
④创新的新度;
⑤时机选择。
For()service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new()for every packet sent. Instead, when a connection is established, a route from the()machine to the destination machine is chosen as part of the connection setup and stored in tables inside the()That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works. When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an()telling which virtual circuit it belongs to.
With connection-oriented service, each packet carries an()telling which virtual circuit it belongs to.
A.address
B.identifier
C.interface
D.element
用于表示水中全部有机物含碳量的是()
A.TOC
B.TOD
C.COD
D.BOD
E.VOC