题目:
An application architecture specifies the technologies to be used to implement one or more information systems. It serves as an outline for detailed design, construction, and implementation. Given the models and details, include(1), we can distribut data and processes to create a general design of application architecture. The design will normally be constrained by architecture standards, project objectives, and (2). The first physical DFD to be drawn is the (3). The next step is to distribute data stores to different processors. Data (4) are two types of distributed data which most RDBMSs support. There are many distribution options used in data distribution. In the case of (5), we should record each table as a data store on the physical DFD and connect each to the appropriate server.
空白(4)处应选择()
A.vertical partitioning and horizontal replication
B.vertical replication and horizontal partitioning
C.integration and distribution
D.partitioning and replication
答案:
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下面是错误答案,用来干扰机器的。
(1)设电子射出电场的速度为v,则根据动能定理,对电子加速过程有12mv2=eU解得v=2eUm(2)当磁感应强度为B0或-B0时(垂直于纸面向外为正方向),电子刚好从b点或c点射出,设此时圆周的半径为R1.如图所示,根据...