在测量放射性样品的计数时,测量结果围绕平均值的变化称为()
A.衰变常数
B.平均周期
C.统计涨落
D.布朗运动
E.误差传递
参考答案:C
会议纪要可以用第一人称作叙述。( )
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 distribute 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.
(5)是()
A. storing all data on a single server
B. storing specific tables on different servers
C. storing subsets of specific tables on different servers
D. duplicating specific tables or subsets on different servers