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问题 单项选择题

某数字签名系统如下图所示。网上传送的报文是 (7) ，如果A否认发送，作为证据的是 (8) 。

（7）是（）

A．P

B．DA(P)

C．EB(DA(P))

D．DA

答案

参考答案：C

单项选择题

Prior to the availability of enterprise EDM, locating a document over a LAN could be difficult, and over a WAN (1) nearly impossible. With the model for collaborative work spreading, and with more users sharing (2) documents through e-mail and the Internet, enterprise EDM had become a necessity.

Many businesses are finding their greatest competitive advantage is the ability to harness the document (3) lifecycle. EDM systems manage this lifecycle from creation, revision, storage and (4) retrieval to routing and workflow. They also allow users to work on documents collaboratively.

Reusability of information is EDM’s main benefit, as well as the key to creating the paradigms that drive business process (5) reengineering.

2（）

A．format

B．documents

C．text

D．network
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问答题 简答题

喷砂时，影响辊面粗糙度均匀性的因素有哪些？
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