闭塞分区界线如何划分?
参考答案:
自动闭塞区间同方向相邻的两架色灯信号机间,以该线上的通过信号机柱的中心线为闭塞分区的分界线。
下列能够体现“弱国无外交”“强权即公理”这些霸权主义现象的是
①巴黎和会②华盛顿会议③慕尼黑协定④《联合国家宣言》[ ]
A.①②③
B.②③④
C.①②④
D.①③④
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(5)处应选择()
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